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gebi/avcodec.c

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Last active August 29, 2015 14:17
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avcodec.c
#define __USE_GNU
#define _GNU_SOURCE
#include <pthread.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include "erl_nif.h"
#include "frog_draw.h"
#ifdef __linux__
__asm__(".symver memcpy,memcpy@GLIBC_2.2.5");
#endif
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavfilter/avcodec.h>
#include <libavfilter/avfilter.h>
#include <libavfilter/avfiltergraph.h>
#include <libavfilter/buffersink.h>
#include <libavfilter/buffersrc.h>
#include <libswscale/swscale.h>
#include <libavutil/opt.h>
#include <libavutil/imgutils.h>
static ErlNifResourceType* decode_resource;
static ErlNifResourceType* encode_resource;
#define YUV_GRAY 127
// #define USE_DIRTY_NIFS
#ifdef USE_DIRTY_NIFS
#ifdef ERL_NIF_DIRTY_SCHEDULER_SUPPORT
#define REALLY_USE_DIRTY_NIFS
#endif
#endif
struct Worker {
int initialized;
int argc;
ERL_NIF_TERM argv[5];
char thread_name[16];
ErlNifTid tid;
int thread_exit;
ErlNifMutex *mutex;
ErlNifCond *cond;
ErlNifEnv *env;
ERL_NIF_TERM ref;
ERL_NIF_TERM self;
ERL_NIF_TERM (*fptr)(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
};
typedef struct FilterContext {
AVFilterContext *buffersink_ctx;
AVFilterContext *buffersrc_ctx;
AVFilterGraph *filter_graph;
} FilterContext;
struct Decoder {
struct Worker w;
AVCodec *decoder;
AVCodecContext *ctx;
struct SwsContext* downscale_ctx;
struct AVFrame *raw_frame;
int description_length;
char *description;
char filter[1024];
struct FilterContext* vgraph;
};
struct Encoder {
struct Worker w;
AVCodec *encoder;
AVCodecContext *ctx;
struct FilterContext* agraph;
struct FilterContext* vgraph;
int description_length;
char *description;
int width;
int height;
// For audio
int input_channels;
int64_t input_channel_layout;
int input_sample_rate;
int input_sample_fmt;
int input_bps;
// For video
int in_width;
int in_height;
int deinterlace;
char filter[1024];
int dts_shift;
};
static const int description_length = 1024;
static ErlNifMutex *av_open_mutex;
static ERL_NIF_TERM avcodec_async_decode(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM avcodec_async_encode(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
int init_graph(FilterContext *filt_ctx, AVCodecContext *ctx, enum AVMediaType codec_type, const char *filter_spec, const char *input_desc);
ERL_NIF_TERM
error_reply(ErlNifEnv* env, char *reason) {
return enif_make_tuple2(env, enif_make_atom(env,"error"), enif_make_atom(env,reason));
}
// This is running in separate thread
void *worker_loop(void *args) {
struct Worker *w = (struct Worker *)args;
// Need to comment it due to sles shit
// if(strlen(w->thread_name) > 0) {
// #ifdef __APPLE__
// pthread_setname_np(w->thread_name);
// #else
// pthread_setname_np(pthread_self(), w->thread_name);
// #endif
// }
while(1) {
if(w->thread_exit) {
enif_thread_exit(NULL);
// return NULL;
}
// First we need to lock mutex to protect from invalid
// argc assignment
enif_mutex_lock(w->mutex);
while(!w->argc && !w->thread_exit) {
// Now if there are no tasks to run, release mutex and lock.
// fprintf(stderr, "%s:%d %u wait\r\n", __FILE__, __LINE__, pthread_self()); fflush(stderr);
enif_cond_wait(w->cond, w->mutex);
// fprintf(stderr, "%s:%d %u wait done. argc: %d, exit: %d\r\n", __FILE__, __LINE__, pthread_self(), w->argc, w->thread_exit); fflush(stderr);
// But check for false wake-up from cond_wait
}
if(w->thread_exit) {
enif_mutex_unlock(w->mutex);
return NULL;
}
int argc = w->argc;
ERL_NIF_TERM *argv = w->argv;
w->argc = 0;
ErlNifEnv *env = w->env;
w->env = NULL;
ERL_NIF_TERM ref = w->ref;
ERL_NIF_TERM remote_self = w->self;
enif_mutex_unlock(w->mutex);
ERL_NIF_TERM result = w->fptr(env, argc, argv);
ErlNifPid self;
if(enif_get_local_pid(env, remote_self, &self)) {
enif_send(NULL, &self, env, enif_make_tuple2(env, ref, result));
}
enif_clear_env(env);
enif_free_env(env);
}
}
void init_worker(ErlNifEnv *env, struct Worker *w, ERL_NIF_TERM (*fptr)(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])) {
if(w->mutex) return;
fprintf(stderr, "Init thread worker\r\n");
w->cond = enif_cond_create("avworker_cond");
w->mutex = enif_mutex_create("avworker_mutex");
ErlNifPid self;
w->self = enif_make_pid(w->env, enif_self(env, &self));
w->fptr = fptr;
enif_thread_create("avworker_thread", &w->tid, worker_loop, w, NULL);
}
void stop_worker(struct Worker *w) {
if(!w->mutex) return;
enif_mutex_lock(w->mutex);
w->thread_exit = 1;
enif_cond_broadcast(w->cond);
enif_mutex_unlock(w->mutex);
enif_thread_join(w->tid, NULL);
// enif_mutex_destroy(w->mutex);
enif_cond_destroy(w->cond);
w->mutex = NULL;
w->cond = NULL;
}
static ERL_NIF_TERM schedule_task(ErlNifEnv *env, struct Worker *w, int argc, const ERL_NIF_TERM argv[]) {
enif_mutex_lock(w->mutex);
w->env = enif_alloc_env();
int i;
for(i = 0; i < argc; i++) {
w->argv[i] = enif_make_copy(w->env, argv[i]);
}
w->argc = argc;
ERL_NIF_TERM ref = enif_make_ref(env);
w->ref = enif_make_copy(w->env, ref);
enif_cond_broadcast(w->cond);
enif_mutex_unlock(w->mutex);
return enif_make_tuple2(env, enif_make_atom(env, "ref"), ref);
}
static ERL_NIF_TERM close0_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
struct Decoder *dec;
struct Encoder *e;
if(argc < 1) return enif_make_badarg(env);
if(enif_get_resource(env, argv[0], decode_resource, (void **)&dec)) {
stop_worker(&dec->w);
return enif_make_atom(env, "ok");
}
if(enif_get_resource(env, argv[0], encode_resource, (void **)&e)) {
stop_worker(&e->w);
return enif_make_atom(env, "ok");
}
return enif_make_atom(env, "false");
}
/* $$$$$$$\ $$\ $$$$$$\ $$\ $$\
$$ __$$\ $$ | \_$$ _| \__| $$ |
$$ | $$ | $$$$$$\ $$$$$$$\ $$$$$$\ $$$$$$$ | $$$$$$\ $$$$$$\ $$ | $$$$$$$\ $$\ $$$$$$\
$$ | $$ |$$ __$$\ $$ _____|$$ __$$\ $$ __$$ |$$ __$$\ $$ __$$\ $$ | $$ __$$\ $$ |\_$$ _|
$$ | $$ |$$$$$$$$ |$$ / $$ / $$ |$$ / $$ |$$$$$$$$ |$$ | \__| $$ | $$ | $$ |$$ | $$ |
$$ | $$ |$$ ____|$$ | $$ | $$ |$$ | $$ |$$ ____|$$ | $$ | $$ | $$ |$$ | $$ |$$\
$$$$$$$ |\$$$$$$$\ \$$$$$$$\ \$$$$$$ |\$$$$$$$ |\$$$$$$$\ $$ | $$$$$$\ $$ | $$ |$$ | \$$$$ |
\_______/ \_______| \_______| \______/ \_______| \_______|\__| \______|\__| \__|\__| \____/
*/
void *decoder_loop(void *);
static ERL_NIF_TERM
avcodec_init_decoder(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {
if(argc < 2) return enif_make_badarg(env);
ErlNifBinary config;
ErlNifBinary codec_name;
ErlNifBinary decoder_filter;
int is_decode_filter=0;
if(!enif_inspect_binary(env, argv[0], &config)) return error_reply(env, "first_arg_must_be_binary");
if(!enif_inspect_binary(env, argv[1], &codec_name)) return error_reply(env, "second_arg_must_be_codec");
AVCodec *decoder = avcodec_find_decoder_by_name((const char *)codec_name.data);
if(!decoder) return error_reply(env, "failed_to_find_decoder");
if(decoder->type == AVMEDIA_TYPE_VIDEO && argc >= 3) {
if(!enif_inspect_binary(env, argv[2], &decoder_filter)) return error_reply(env, "arg_3_must_be_binary");
is_decode_filter = 1;
}
AVCodecContext *decoder_ctx = avcodec_alloc_context3(decoder);
//decoder_ctx->lowres = 0;
//decoder_ctx->idct_algo = FF_IDCT_LIBMPEG2MMX;
decoder_ctx->flags2 |= CODEC_FLAG2_FAST;
decoder_ctx->skip_frame = AVDISCARD_DEFAULT;
decoder_ctx->skip_idct = AVDISCARD_DEFAULT;
decoder_ctx->skip_loop_filter = AVDISCARD_DEFAULT;
if(config.size > 0) {
if(decoder->id == AV_CODEC_ID_PCM_ALAW || decoder->id == AV_CODEC_ID_PCM_MULAW) {
decoder_ctx->channels = *(uint8_t *)config.data;
} else {
decoder_ctx->extradata_size = config.size;
decoder_ctx->extradata = av_mallocz(config.size);
memcpy(decoder_ctx->extradata, (const char *)config.data, config.size);
}
} else {
decoder_ctx->extradata_size = 0;
decoder_ctx->extradata = NULL;
}
enif_mutex_lock(av_open_mutex);
if(avcodec_open2(decoder_ctx, decoder, NULL) < 0) {
enif_mutex_unlock(av_open_mutex);
av_free(decoder_ctx);
return error_reply(env, "failed_to_open_decoder");
}
enif_mutex_unlock(av_open_mutex);
struct Decoder *dec;
int len = sizeof(struct Decoder) + description_length + 1;
dec = (struct Decoder *)enif_alloc_resource(decode_resource, len);
memset(dec, 0, len);
dec->description_length = description_length;
dec->decoder = decoder;
dec->ctx = decoder_ctx;
dec->description = (char *)dec + sizeof(struct Decoder);
dec->downscale_ctx = NULL;
dec->raw_frame = av_frame_alloc();
if(is_decode_filter) {
strncpy(dec->filter, (const char *)decoder_filter.data, sizeof(dec->filter));
}
if(decoder->type == AVMEDIA_TYPE_VIDEO) {
snprintf(dec->description, dec->description_length, "avcodec,decoder,codec=%s,src=%dx%d,dst=%dx%d",
decoder->name, dec->ctx->width, dec->ctx->width, 0, 0);
} else {
char chan_layout[50];
if(decoder_ctx->channel_layout) {
av_get_channel_layout_string(chan_layout, sizeof(chan_layout), -1, decoder_ctx->channel_layout);
} else {
sprintf(chan_layout, "none");
}
snprintf(dec->description, dec->description_length, "avcodec,decoder,codec=%s,sample_fmt=%s,channel_layout=%s",
decoder->name, av_get_sample_fmt_name(decoder_ctx->sample_fmt), chan_layout);
}
snprintf(dec->w.thread_name, 16, "avdecoder");
#ifndef REALLY_USE_DIRTY_NIFS
init_worker(env, &dec->w, avcodec_async_decode);
#endif
ERL_NIF_TERM dec_term = enif_make_resource_binary(env, dec, dec->description, strlen(dec->description));
enif_release_resource(dec);
return enif_make_tuple2(env,
enif_make_atom(env, "ok"),
dec_term
);
}
/* $$$$$$$\ $$\
$$ __$$\ $$ |
$$ | $$ | $$$$$$\ $$$$$$$\ $$$$$$\ $$$$$$$ | $$$$$$\
$$ | $$ |$$ __$$\ $$ _____|$$ __$$\ $$ __$$ |$$ __$$\
$$ | $$ |$$$$$$$$ |$$ / $$ / $$ |$$ / $$ |$$$$$$$$ |
$$ | $$ |$$ ____|$$ | $$ | $$ |$$ | $$ |$$ ____|
$$$$$$$ |\$$$$$$$\ \$$$$$$$\ \$$$$$$ |\$$$$$$$ |\$$$$$$$\
\_______/ \_______| \_______| \______/ \_______| \_______|
*/
static ERL_NIF_TERM
decode_video(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {
if(argc != 4) return error_reply(env, "need_4_args");
struct Decoder *dec;
ErlNifBinary h264;
ErlNifBinary yuv;
char err_buf[256];
if(!enif_get_resource(env, argv[0], decode_resource, (void **)&dec)) {
return error_reply(env, "arg_0_must_be_decoder");
}
if(!enif_inspect_binary(env, argv[1], &h264)) {
return error_reply(env, "arg_1_must_be_binary");
}
ErlNifSInt64 dts, pts;
if(!enif_get_int64(env, argv[2], &dts)) {
return error_reply(env, "arg_2_must_be_int_dts");
}
if(!enif_get_int64(env, argv[3], &pts)) {
return error_reply(env, "arg_3_must_be_int_pts");
}
AVPacket in_pkt;
av_init_packet(&in_pkt);
in_pkt.data = h264.data;
in_pkt.size = h264.size;
in_pkt.dts = dts;
in_pkt.pts = pts;
av_frame_unref(dec->raw_frame);
int decoded = 0;
if(avcodec_decode_video2(dec->ctx, dec->raw_frame, &decoded, &in_pkt) < 0) {
return error_reply(env, "couldnt_decode");
}
if(!decoded) {
return error_reply(env, "not_avdecoded");
}
ERL_NIF_TERM reply;
ErlNifSInt64 out_pts;
ERL_NIF_TERM out_frames[20];
int out_count = 0;
if(dec->ctx->width <= 0) return error_reply(env, "bad_width");
if(dec->ctx->height <= 0) return error_reply(env, "bad_height");
dec->raw_frame->pts = av_frame_get_best_effort_timestamp(dec->raw_frame);
// snprintf(dec->description, dec->description_length, "avcodec decoder(%dx%d) -> (%dx%d)", dec->ctx->width, dec->ctx->width,
// 0, 0);
if(dec->raw_frame->width <= 0 || dec->raw_frame->width >= 5000 ||
dec->raw_frame->height <= 0 || dec->raw_frame->height >= 5000 ||
dec->ctx->width <= 0 || dec->ctx->width >= 5000 ||
dec->ctx->height <= 0 || dec->ctx->height >= 5000
) {
reply = enif_make_tuple2(env, enif_make_atom(env, "error"),
enif_make_tuple7(env,
enif_make_atom(env, "dimensions"),
enif_make_int(env, dec->raw_frame->width), enif_make_int(env, dec->raw_frame->height),
enif_make_int(env, dec->ctx->width), enif_make_int(env, dec->ctx->height),
enif_make_int(env, 0), enif_make_int(env, 0))
);
return reply;
}
AVFrame *filter_frame;
int is_filtred = 1;
if(strlen(dec->filter) > 0) {
int ret;
if(dec->vgraph == NULL) {
av_log(NULL, AV_LOG_INFO, "\rInit decode filter:(%s)\r\n", dec->filter);
dec->vgraph = av_malloc(sizeof(*(dec->vgraph)));
char input_desc[1024];
snprintf(input_desc, sizeof(input_desc),
"video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
dec->ctx->width, dec->ctx->height, dec->ctx->pix_fmt,
dec->ctx->time_base.num, dec->ctx->time_base.den,
dec->ctx->sample_aspect_ratio.num,
dec->ctx->sample_aspect_ratio.den);
if(init_graph(dec->vgraph, dec->ctx, AVMEDIA_TYPE_VIDEO, dec->filter, input_desc) < 0) {
av_log(NULL, AV_LOG_INFO, "\rinit_graph for decode fail\r\n");
is_filtred = 0;
goto END_FILTER;
}
}
if((ret = av_buffersrc_add_frame_flags(dec->vgraph->buffersrc_ctx, dec->raw_frame, AV_BUFFERSRC_FLAG_PUSH)) < 0) {
av_log(NULL, AV_LOG_INFO, "\rav_buffersrc_add_frame for decode fail: %d\r\n", ret);
is_filtred = 0;
goto END_FILTER;
}
ErlNifBinary yuv;
while(1) {
filter_frame = av_frame_alloc();
if(!filter_frame) {
return error_reply(env, "ENOMEM");
}
if((ret = av_buffersink_get_frame(dec->vgraph->buffersink_ctx, filter_frame)) < 0) {
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
av_frame_free(&filter_frame);
ret = 0;
break;
}
av_strerror(ret, err_buf, sizeof(err_buf));
av_log(NULL, AV_LOG_INFO, "\rav_buffersinc_get_frame for decode fail: %d - %s\r\n", ret, err_buf);
is_filtred = 0;
av_frame_free(&filter_frame);
break;
}
int width = filter_frame->width;
int height = filter_frame->height;
int buffer_size = av_image_get_buffer_size(filter_frame->format, width, height, 1);
if(!enif_alloc_binary(buffer_size, &yuv)) {
av_frame_free(&filter_frame);
return enif_make_atom(env, "failed_to_allocate_binary");
}
av_image_copy_to_buffer(yuv.data, buffer_size, (const uint8_t **)(filter_frame->data),
filter_frame->linesize, filter_frame->format, filter_frame->width, filter_frame->height, 1);
out_pts = filter_frame->pts == AV_NOPTS_VALUE ? dts : filter_frame->pts;
av_frame_free(&filter_frame);
out_frames[out_count] = enif_make_tuple5(env,
enif_make_atom(env, "yuv"),
enif_make_binary(env, &yuv),
enif_make_int64(env, out_pts),
enif_make_int(env, width),
enif_make_int(env, height)
);
out_count++;
}
END_FILTER:
;
} else {
is_filtred = 0;
}
int width, height;
if(is_filtred) {
if(out_count == 0) {
reply = enif_make_atom(env, "undefined");
} else if(out_count == 1) {
reply = out_frames[0];
} else {
reply = enif_make_tuple2(env,
enif_make_atom(env, "ok"),
enif_make_list_from_array(env, out_frames, out_count)
);
}
} else {
width = dec->ctx->width;
height = dec->ctx->height;
int buffer_size = av_image_get_buffer_size(dec->ctx->pix_fmt, width, height, 1);
if(!enif_alloc_binary(buffer_size, &yuv)) {
return enif_make_atom(env, "failed_to_allocate_binary");
}
av_image_copy_to_buffer(yuv.data, buffer_size, (const uint8_t **)(dec->raw_frame->data),
dec->raw_frame->linesize, dec->ctx->pix_fmt, dec->ctx->width, dec->ctx->height, 1);
out_pts = dec->raw_frame->pts == AV_NOPTS_VALUE ? dts : dec->raw_frame->pts;
reply = enif_make_tuple5(env,
enif_make_atom(env, "yuv"),
enif_make_binary(env, &yuv),
enif_make_int64(env, out_pts),
enif_make_int(env, width),
enif_make_int(env, height)
);
}
return reply;
}
static ERL_NIF_TERM
decode_audio(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {
if(argc != 4) return error_reply(env, "need_4_args");
struct Decoder *dec;
ErlNifBinary encoded;
ErlNifBinary pcm;
if(!enif_get_resource(env, argv[0], decode_resource, (void **)&dec)) {
return error_reply(env, "arg_0_must_be_decoder");
}
if(!enif_inspect_binary(env, argv[1], &encoded)) {
return error_reply(env, "arg_1_must_be_binary");
}
ErlNifSInt64 dts, pts;
if(!enif_get_int64(env, argv[2], &dts)) {
return error_reply(env, "arg_2_must_be_int_dts");
}
if(!enif_get_int64(env, argv[3], &pts)) {
return error_reply(env, "arg_3_must_be_int_pts");
}
AVPacket in_pkt;
av_init_packet(&in_pkt);
in_pkt.data = encoded.data;
in_pkt.size = encoded.size;
in_pkt.dts = dts;
in_pkt.pts = pts;
// AVPacket out_pkt;
av_frame_unref(dec->raw_frame);
int decoded = 0;
if(avcodec_decode_audio4(dec->ctx, dec->raw_frame, &decoded, &in_pkt) < 0) {
return error_reply(env, "couldnt_decode");
}
if(!decoded) {
return error_reply(env, "not_avdecoded");
}
ERL_NIF_TERM reply;
int ch, plane_size;
int data_size = av_samples_get_buffer_size(&plane_size, dec->ctx->channels,
dec->raw_frame->nb_samples,
dec->ctx->sample_fmt, 1);
int planar = av_sample_fmt_is_planar(dec->ctx->sample_fmt);
if(data_size < 0){
return enif_make_atom(env, "undefined");
}
if(!enif_alloc_binary(data_size, &pcm)) {
return enif_make_atom(env, "failed_to_allocate_binary");
}
memcpy(pcm.data, dec->raw_frame->extended_data[0], plane_size);
//For planar audio, each channel has a separate data pointer
if(planar && dec->ctx->channels > 1) {
uint8_t *out = ((uint8_t *)pcm.data) + plane_size;
for (ch = 1; ch < dec->ctx->channels; ch++) {
memcpy(out, dec->raw_frame->extended_data[ch], plane_size);
out += plane_size;
}
}
reply = enif_make_tuple3(env,
enif_make_atom(env, "pcm"),
enif_make_binary(env, &pcm),
enif_make_int64(env, dec->raw_frame->pts == AV_NOPTS_VALUE ? dts : dec->raw_frame->pts)
);
return reply;
}
static ERL_NIF_TERM
avcodec_async_decode(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {
struct Decoder *dec = NULL;
enif_get_resource(env, argv[0], decode_resource, (void **)&dec);
return dec->decoder->type == AVMEDIA_TYPE_VIDEO ? decode_video(env, argc, argv) : decode_audio(env, argc, argv);
}
static ERL_NIF_TERM
avcodec_decode(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {
if(argc != 4) {
return error_reply(env,"need_4_args");
}
struct Decoder *dec;
if(!enif_get_resource(env, argv[0], decode_resource, (void **)&dec)) {
return error_reply(env,"arg_0_must_be_decoder");
}
if(!enif_is_binary(env, argv[1])) {
return error_reply(env, "arg_1_must_be_binary");
}
if(dec->decoder->type == AVMEDIA_TYPE_VIDEO || dec->decoder->type == AVMEDIA_TYPE_AUDIO) {
return schedule_task(env, &dec->w, argc, argv);
} else {
return error_reply(env, "can_decode_video_or_audio");
}
}
static ERL_NIF_TERM
avcodec_draw_char(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {
if(argc != 6) return error_reply(env, "neet_four_args");
ErlNifBinary yuv;
int x;
int y;
int w;
int h;
ErlNifBinary ch_image;
if(!enif_inspect_binary(env, argv[0], &yuv)) return error_reply(env, "1_arg_must_be_binary");
if(!enif_get_int(env, argv[1], &x)) return error_reply(env, "2_arg_must_be_int");
if(!enif_get_int(env, argv[2], &y)) return error_reply(env, "3_arg_must_be_int");
if(!enif_get_int(env, argv[3], &w)) return error_reply(env, "4_arg_must_be_int");
if(!enif_get_int(env, argv[4], &h)) return error_reply(env, "5_arg_must_be_int");
if(!enif_inspect_binary(env, argv[5], &ch_image)) return error_reply(env, "6_arg_must_be_binary");
if(ch_image.size != 64) return error_reply(env, "6_arg_must_have_size_8x8_bytes");
frog_draw_8x8((uint64_t*)ch_image.data, x, y, yuv.data, w, h);
return enif_make_atom(env, "ok");
}
/* $$$$$$$$\ $$\ $$$$$$\ $$\ $$\
$$ _____| $$ | \_$$ _| \__| $$ |
$$ | $$$$$$$\ $$$$$$$\ $$$$$$\ $$$$$$$ | $$$$$$\ $$$$$$\ $$ | $$$$$$$\ $$\ $$$$$$\
$$$$$\ $$ __$$\ $$ _____|$$ __$$\ $$ __$$ |$$ __$$\ $$ __$$\ $$ | $$ __$$\ $$ |\_$$ _|
$$ __| $$ | $$ |$$ / $$ / $$ |$$ / $$ |$$$$$$$$ |$$ | \__| $$ | $$ | $$ |$$ | $$ |
$$ | $$ | $$ |$$ | $$ | $$ |$$ | $$ |$$ ____|$$ | $$ | $$ | $$ |$$ | $$ |$$\
$$$$$$$$\ $$ | $$ |\$$$$$$$\ \$$$$$$ |\$$$$$$$ |\$$$$$$$\ $$ | $$$$$$\ $$ | $$ |$$ | \$$$$ |
\________|\__| \__| \_______| \______/ \_______| \_______|\__| \______|\__| \__|\__| \____/
*/
int init_audio_graph(char *input_desc, struct Encoder *);
int init_video_graph(char *input_desc, struct Encoder *, char *logo);
/*
* Init encoders */
static ERL_NIF_TERM
avcodec_init_encoder(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {
struct Encoder *enc;
if(argc < 2) return error_reply(env, "need_2_args");
ErlNifBinary codec_name;
if(!enif_inspect_binary(env, argv[0], &codec_name)) return error_reply(env, "first_arg_must_be_codec");
AVCodec *encoder = avcodec_find_encoder_by_name((const char *)codec_name.data);
if(!encoder) return error_reply(env, "no_such_codec");
AVCodecContext *encoder_ctx = avcodec_alloc_context3(encoder);
if(encoder->type == AVMEDIA_TYPE_VIDEO) {
encoder_ctx->pix_fmt = AV_PIX_FMT_YUV420P;
encoder_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER;
encoder_ctx->time_base = (AVRational){1,1};
encoder_ctx->sample_aspect_ratio = (AVRational){1,1};
encoder_ctx->width = encoder_ctx->height = -1;
if(!strcmp((const char *)codec_name.data, "mjpeg")) {
encoder_ctx->pix_fmt = AV_PIX_FMT_YUVJ420P;
encoder_ctx->time_base = (AVRational){1,50};
}
}
if(encoder->type == AVMEDIA_TYPE_AUDIO) {
encoder_ctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
encoder_ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
encoder_ctx->time_base = (AVRational){1,1};
}
AVDictionary *options = NULL;
ERL_NIF_TERM head, tail, list;
list = argv[1];
int64_t input_channel_layout = -1;
int input_sample_rate = -1;
int input_sample_fmt = -1;
int in_width = 0, in_height = 0;
int in_sarw = 1, in_sarh = 1; // Aspect ratio
// Form scale filter documentation:
// -1 - Select interlaced aware scaling depending on whether
// the source frames are flagged as interlaced or not.
int deinterlace = 0;
char logo[1024] = "";
// Parse options from erlang
while(enif_get_list_cell(env, list, &head, &tail)) {
int arity = 0;
const ERL_NIF_TERM* kv;
if(!enif_get_tuple(env, head, &arity, &kv)) return error_reply(env, "options_are_proplist");
if(arity != 2) return error_reply(env, "options_are_proplist_2");
char k[256];
char v[1024];
memset(v,0,sizeof(v));
ErlNifBinary v_;
if(!enif_get_atom(env, kv[0], k, sizeof(k), ERL_NIF_LATIN1)) return error_reply(env, "only_atom_keys");
if(!enif_inspect_binary(env, kv[1], &v_)) {
list = tail;
continue;
}
strncpy(v, (const char *)v_.data, v_.size > 255 ? 255 : v_.size);
if(!strcmp("input_channel_layout", k)) {
input_channel_layout = av_get_channel_layout(v);
} else if(!strcmp("input_sample_rate", k)) {
input_sample_rate = atoi(v);
} else if(!strcmp("input_sample_fmt", k)) {
input_sample_fmt = av_get_sample_fmt(v);
} else if(!strcmp("width", k)) {
encoder_ctx->width = atoi(v);
} else if(!strcmp("height", k)) {
encoder_ctx->height = atoi(v);
} else if(!strcmp("in_width", k)) {
in_width = atoi(v);
} else if(!strcmp("in_height", k)) {
in_height = atoi(v);
} else if(!strcmp("sarw", k)) {
in_sarw = atoi(v);
} else if(!strcmp("sarh", k)) {
in_sarh = atoi(v);
} else if(!strcmp("logo", k)) {
strncpy(logo, v, sizeof(logo));
} else if(!strcmp("deinterlace", k)) {
deinterlace = atoi(v);
} else {
if(!strcmp("b",k)) {
encoder_ctx->bit_rate = atoi(v);
}
if(!strcmp("channels",k)) {
encoder_ctx->channels = atoi(v);
}
if(!strcmp("sample_rate",k)) {
encoder_ctx->sample_rate = atoi(v);
encoder_ctx->time_base = (AVRational){1,encoder_ctx->sample_rate};
}
av_dict_set(&options, k, v, 0);
}
list = tail;
}
if(encoder->type == AVMEDIA_TYPE_VIDEO && (!(encoder_ctx->width > 0) || !(encoder_ctx->height > 0))) {
av_log(NULL, AV_LOG_INFO, "\rwidth_height_must_be_positive\r\n");
av_free(encoder_ctx);
return error_reply(env, "width_height_must_be_positive");
}
// avcodec_open
enif_mutex_lock(av_open_mutex);
if(avcodec_open2(encoder_ctx, encoder, &options) == -1) {
enif_mutex_unlock(av_open_mutex);
av_free(encoder_ctx);
return error_reply(env, "failed_open_codec");
}
enif_mutex_unlock(av_open_mutex);
int len = sizeof(struct Encoder) + description_length + 1;
enc = (struct Encoder *)enif_alloc_resource(encode_resource, len);
memset(enc, 0, len);
enc->description_length = description_length;
enc->encoder = encoder;
enc->ctx = encoder_ctx;
enc->description = (char *)enc + sizeof(struct Encoder);
snprintf(enc->description, enc->description_length, "avcodec %s encoder(%dx%d)", codec_name.data, enc->ctx->width, enc->ctx->height);
ErlNifBinary config;
if(!enif_alloc_binary(encoder_ctx->extradata_size, &config)) {
return enif_make_atom(env, "failed_to_allocate_binary");
}
memcpy(config.data, encoder_ctx->extradata, encoder_ctx->extradata_size);
char input_desc[1024];
if(encoder->type == AVMEDIA_TYPE_AUDIO) {
enc->input_channels = av_get_channel_layout_nb_channels(input_channel_layout);
enc->input_channel_layout = input_channel_layout;
enc->input_sample_fmt = input_sample_fmt;
enc->input_sample_rate = input_sample_rate;
enc->input_bps = enc->input_channels*av_get_bytes_per_sample(input_sample_fmt);
AVRational time_base = {1,input_sample_rate};
snprintf(input_desc, sizeof(input_desc),
"time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%"PRIx64,
time_base.num, time_base.den, input_sample_rate,
av_get_sample_fmt_name(input_sample_fmt), input_channel_layout);
// init audio graph
int res = init_audio_graph(input_desc, enc);
if(res < 0) {
char areason[1024];
sprintf(areason, "failed_to_open_audio_graph(%s): %d", input_desc, res);
return error_reply(env, areason);
}
} else if(encoder->type == AVMEDIA_TYPE_VIDEO) {
enc->in_width = in_width;
enc->in_height = in_height;
enc->deinterlace = deinterlace;
snprintf(input_desc, sizeof(input_desc),
"video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
in_width, in_height, AV_PIX_FMT_YUV420P, 1, 90000, in_sarw, in_sarh);
int res = init_video_graph(input_desc, enc, logo);
if(res < 0) {
char reason[1024];
sprintf(reason, "failed_to_open_video_graph(%s): %d", input_desc, res);
return error_reply(env, reason);
}
}
snprintf(enc->w.thread_name, 16, "avencoder");
#ifndef REALLY_USE_DIRTY_NIFS
init_worker(env, &enc->w, avcodec_async_encode);
#endif
ERL_NIF_TERM enc_term = enif_make_resource_binary(env, enc, enc->description, strlen(enc->description));
enif_release_resource(enc);
return enif_make_tuple3(env,
enif_make_atom(env, "ok"),
enif_make_binary(env, &config),
enc_term
);
}
/*
* Init filter graph
*/
int init_graph(FilterContext *filt_ctx, AVCodecContext *ctx, enum AVMediaType codec_type, const char *filter_spec, const char *input_desc) {
// Constant same on decode_
const enum AVSampleFormat sample_fmts[] = { ctx->sample_fmt, -1 };
const enum AVPixelFormat pix_fmt = ctx->pix_fmt;
AVFilterContext *buffersrc_ctx = NULL;
AVFilterContext *buffersink_ctx = NULL;
AVFilter *buffersrc = NULL;
AVFilter *buffersink = NULL;
AVFilterGraph *filter_graph = avfilter_graph_alloc();
AVFilterInOut *outputs = avfilter_inout_alloc();
AVFilterInOut *inputs = avfilter_inout_alloc();
int ret = 0;
int rcode = 0;
if(!outputs || !inputs || !filter_graph) {
ret = AVERROR(ENOMEM);
av_log(NULL, AV_LOG_INFO, "\rENOMEM on enter init_graph\r\n");
goto end;
}
if(codec_type == AVMEDIA_TYPE_AUDIO) {
buffersrc = avfilter_get_by_name("abuffer");
buffersink = avfilter_get_by_name("abuffersink");
if(!buffersrc || !buffersink){
av_log(NULL, AV_LOG_INFO, "\rfiltering source or sink element not found\r\n");
ret = -6;
goto end;
}
/* buffer audio source: the decoded frames from the decoder will be inserted here. */
if((rcode = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in",
input_desc, NULL, filter_graph)) < 0) {
av_log(NULL, AV_LOG_INFO, "\rCannot create audio buffer source: 0x%x\r\n", rcode);
ret = -2;
goto end;
// error("Cannot create audio buffer source");
}
/* buffer audio sink: to terminate the filter chain. */
if(avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out",
NULL, NULL, filter_graph) < 0) {
av_log(NULL, AV_LOG_INFO, "\rCannot create audio buffer sink\r\n");
// error("Cannot create audio buffer sink");
ret = -3;
goto end;
}
if(av_opt_set_int_list(buffersink_ctx, "sample_fmts", sample_fmts, -1,
AV_OPT_SEARCH_CHILDREN) < 0){
av_log(NULL, AV_LOG_INFO, "\rCannot set output sample format\n");
ret = -9;
goto end;
}
} else if(codec_type == AVMEDIA_TYPE_VIDEO) {
buffersrc = avfilter_get_by_name("buffer");
buffersink = avfilter_get_by_name("buffersink");
if(!buffersrc || !buffersink){
av_log(NULL, AV_LOG_INFO, "\rfiltering source or sink element not found\r\n");
ret = -6;
goto end;
}
/* buffer video source*/
if((rcode = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in",
input_desc, NULL, filter_graph)) < 0) {
av_log(NULL, AV_LOG_INFO, "\rCannot create video buffer source: 0x%x\r\n", rcode);
ret = -2;
goto end;
}
/* buffer video sink*/
if(avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out",
NULL, NULL, filter_graph) < 0) {
av_log(NULL, AV_LOG_INFO, "\rCannot create audio buffer sink\r\n");
ret = -3;
goto end;
}
if(av_opt_set_bin(buffersink_ctx, "pix_fmts",
(uint8_t*)&pix_fmt, sizeof(pix_fmt), AV_OPT_SEARCH_CHILDREN)) {
av_log(NULL, AV_LOG_INFO, "\rCannot set output sample format\n");
ret = -9;
goto end;
}
} else {
ret = AVERROR_UNKNOWN;
}
/* Endpoints for the filter graph. */
outputs->name = av_strdup("in");
outputs->filter_ctx = buffersrc_ctx;
outputs->pad_idx = 0;
outputs->next = NULL;
inputs->name = av_strdup("out");
inputs->filter_ctx = buffersink_ctx;
inputs->pad_idx = 0;
inputs->next = NULL;
if (avfilter_graph_parse_ptr(filter_graph, filter_spec, &inputs, &outputs, NULL) < 0) {
av_log(NULL, AV_LOG_INFO, "Cannot graph parse\n");
ret = -4;
goto end;
}
if (avfilter_graph_config(filter_graph, NULL) < 0) {
av_log(NULL, AV_LOG_INFO, "Cannot graph config\n");
ret = -5;
goto end;
}
if(ctx->frame_size) {
av_buffersink_set_frame_size(buffersink_ctx, ctx->frame_size);
}
filt_ctx->buffersrc_ctx = buffersrc_ctx;
filt_ctx->buffersink_ctx = buffersink_ctx;
filt_ctx->filter_graph = filter_graph;
end:
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
return ret;
}
/*
* Init audio graph
*/
int init_audio_graph(char *input_desc, struct Encoder *enc) {
const char *filter_desc = "anull";
FilterContext *audio = av_malloc(sizeof(*audio));
int ret = init_graph(audio, enc->ctx, AVMEDIA_TYPE_AUDIO, filter_desc, input_desc);
enc->agraph = audio;
return ret;
}
/*
* Init video graph
*/
int init_video_graph(char *input_desc, struct Encoder *enc, char *logo) {
//
// Parse logo parameter syntx: path@overlay_param
//
char logo_name[512] = "",logo_param[512] = "";
const char delim[2] = "@";
char *token, *save_ptr;
int n;
for(n=0 ; ; n++,logo=NULL) {
token = strtok_r(logo, delim, &save_ptr);
if(token == NULL)
break;
if(n == 0) {
strncpy(logo_name, token, sizeof(logo_name));
} else if(n == 1) {
strncpy(logo_param, token, sizeof(logo_param));
} else {
break;
}
}
char filter_desc[2048];
char scale_desc[1024];
char yadif_desc[20] = ""; // deinterlace
if(enc->deinterlace) {
// mode=0 The interlacing mode to adopt. Output one frame for each frame.
// parity=-1 The picture field parity assumed for the input interlaced video. Assume the bottom field is first.
// deint=0 Specify which frames to deinterlace. Deinterlace all frames.
snprintf(yadif_desc, sizeof(yadif_desc), "yadif=0:-1:0,");
}
snprintf(scale_desc, sizeof(scale_desc), "scale=w=%d:h=%d:interl=-1",
enc->ctx->width, enc->ctx->height);
//
// If logo ok enjoy overlay filter
//
if(strlen(logo_name) > 0 && strlen(logo_param) > 0) {
snprintf(filter_desc, sizeof(filter_desc), "movie=\'%s\'[watermark];[in][watermark] overlay=%s,%s%s [out]",
logo_name, logo_param, yadif_desc, scale_desc);
} else {
sprintf(filter_desc, "%s", scale_desc);
}
av_log(NULL, AV_LOG_INFO, "\rInit video graph with filter:%s\n", filter_desc);
FilterContext *video = av_malloc(sizeof(*video));
int ret = init_graph(video, enc->ctx, AVMEDIA_TYPE_VIDEO, filter_desc, input_desc);
enc->vgraph = video;
return ret;
}
/* $$$$$$$$\ $$\
$$ _____| $$ |
$$ | $$$$$$$\ $$$$$$$\ $$$$$$\ $$$$$$$ | $$$$$$\
$$$$$\ $$ __$$\ $$ _____|$$ __$$\ $$ __$$ |$$ __$$\
$$ __| $$ | $$ |$$ / $$ / $$ |$$ / $$ |$$$$$$$$ |
$$ | $$ | $$ |$$ | $$ | $$ |$$ | $$ |$$ ____|
$$$$$$$$\ $$ | $$ |\$$$$$$$\ \$$$$$$ |\$$$$$$$ |\$$$$$$$\
\________|\__| \__| \_______| \______/ \_______| \_______|
*/
static ERL_NIF_TERM
encode_video(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {
if(argc < 3 || argc > 4) return error_reply(env, "wrong_number_of_args");
struct Encoder *enc;
ErlNifBinary yuv;
ErlNifSInt64 pts = AV_NOPTS_VALUE;
int keyframe = 0;
if(!enif_get_resource(env, argv[0], encode_resource, (void **)&enc)) {
return error_reply(env, "arg_0_must_be_encoder");
}
if(!enif_inspect_binary(env, argv[1], &yuv)) return error_reply(env, "arg_1_must_be_binary");
if(!enif_get_int64(env, argv[2], &pts)) return error_reply(env, "arg_2_must_be_pts");
//if(yuv.size != enc->ctx->width*enc->ctx->height*3/2) {
// return error_reply(env, "invalid_yuv_size");
// av_log(NULL, AV_LOG_INFO, "\rwarning invalid yuv size %zd != %d\r\n", yuv.size, enc->ctx->width*enc->ctx->height*3/2);
//}
if(argc >= 4 && !enif_get_int(env, argv[3], &keyframe)) return error_reply(env, "arg_4_must_be_int");
AVFrame *frame = av_frame_alloc();;
av_frame_unref(frame);
frame->width = enc->in_width;
frame->height = enc->in_height;
frame->format = AV_PIX_FMT_YUV420P;
frame->pts = pts;
frame->key_frame = keyframe;
av_image_fill_arrays(frame->data, frame->linesize, yuv.data, frame->format, frame->width, frame->height, 1);
if(av_buffersrc_add_frame_flags(enc->vgraph->buffersrc_ctx, frame, AV_BUFFERSRC_FLAG_PUSH) < 0) {
av_frame_free(&frame);
av_log(NULL, AV_LOG_INFO, "\rfailed_push_to_vgraph\r\n");
return error_reply(env,"failed_push_to_vgraph");
}
ERL_NIF_TERM outframes[20];
int out_count=0;
AVFrame *filt_frame;
int ret;
while(1) {
filt_frame = av_frame_alloc();
if (!filt_frame) {
return error_reply(env,"ENOMEM");
}
ret = av_buffersink_get_frame(enc->vgraph->buffersink_ctx, filt_frame);
if (ret < 0) {
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
ret = 0;
}
av_frame_free(&filt_frame);
break;
}
AVPacket pkt;
ErlNifBinary h264;
av_init_packet(&pkt);
if(!enif_alloc_binary(enc->ctx->width*enc->ctx->height, &h264)) {
av_log(NULL, AV_LOG_INFO, "\rfailed_to_allocate_binary\r\n");
return enif_make_atom(env, "failed_to_allocate_binary");
}
pkt.data = h264.data;
pkt.size = h264.size;
int could_encode = 0;
if(avcodec_encode_video2(enc->ctx, &pkt, filt_frame, &could_encode) != 0) {
av_log(NULL, AV_LOG_INFO, "\ravcodec_encode_video2 error\r\n");
av_frame_free(&filt_frame);
return enif_make_atom(env, "undefined");
}
av_frame_free(&filt_frame);
if(!could_encode) {
enif_release_binary(&h264);
continue;
}
if(!enif_realloc_binary(&h264, pkt.size)) {
av_log(NULL, AV_LOG_INFO, "\rfailed_to_allocate_binary\r\n");
return enif_make_atom(env, "failed_to_allocate_binary");
}
if(pkt.dts < 0) {
enc->dts_shift = -pkt.dts;
}
outframes[out_count] = enif_make_tuple5(env,
enif_make_atom(env, "ok"),
pkt.flags & AV_PKT_FLAG_KEY ? enif_make_atom(env, "keyframe") : enif_make_atom(env, "frame"),
enif_make_int64(env, pkt.dts + enc->dts_shift),
enif_make_int64(env, pkt.pts + enc->dts_shift),
enif_make_binary(env, &h264)
);
out_count++;
}
if(out_count == 0) {
return enif_make_atom(env, "undefined");
} else if(out_count == 1 ){
return outframes[0];
} else {
return enif_make_tuple2(env,
enif_make_atom(env, "ok"),
enif_make_list_from_array(env, outframes, out_count)
);
}
}
static ERL_NIF_TERM
encode_audio(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {
if(argc < 3) return error_reply(env, "wrong_number_of_args");
struct Encoder *enc;
ErlNifBinary pcm;
ErlNifSInt64 pts = AV_NOPTS_VALUE;
if(!enif_get_resource(env, argv[0], encode_resource, (void **)&enc)) {
return error_reply(env, "arg_0_must_be_encoder");
}
if(!enif_inspect_binary(env, argv[1], &pcm)) return error_reply(env, "arg_1_must_be_binary");
if(!enif_get_int64(env, argv[2], &pts)) return error_reply(env, "arg_2_must_be_pts");
AVFrame *raw_audio = av_frame_alloc();;
av_frame_unref(raw_audio);
raw_audio->data[0] = pcm.data;
raw_audio->nb_samples = pcm.size / enc->input_bps;
raw_audio->channels = enc->input_channels;
raw_audio->channel_layout = enc->input_channel_layout;
raw_audio->sample_rate = enc->input_sample_rate;
raw_audio->format = enc->input_sample_fmt;
raw_audio->pts = pts;
av_samples_fill_arrays(raw_audio->extended_data, raw_audio->linesize, pcm.data, raw_audio->channels,
raw_audio->nb_samples, raw_audio->format, 1);
if (av_buffersrc_add_frame_flags(enc->agraph->buffersrc_ctx, raw_audio, AV_BUFFERSRC_FLAG_PUSH) < 0) {
av_frame_free(&raw_audio);
return error_reply(env,"failed_push_to_agraph");
}
av_frame_free(&raw_audio);
ERL_NIF_TERM outframes[20];
int out_count = 0;
AVFrame *samplesref;
int ret = 0;
while (1) {
samplesref = av_frame_alloc();
ret = av_buffersink_get_frame(enc->agraph->buffersink_ctx, samplesref);
if(ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
av_frame_free(&samplesref);
break;
}
if(ret < 0) {
av_frame_free(&samplesref);
return error_reply(env,"failed_to_run_agraph");
}
samplesref->pts = av_rescale_q(samplesref->pts,
enc->agraph->buffersink_ctx->inputs[0]->time_base,
enc->ctx->time_base);
// fprintf(stderr, "rescale %lld to %lld. Timebase1: %d/%d, tb2: %d/%d\r\n",
// samplesref->pts, filtered_frame->pts,
// enc->agraph->buffersink_ctx->inputs[0]->time_base.num,enc->agraph->buffersink_ctx->inputs[0]->time_base.den,
// enc->ctx->time_base.num, enc->ctx->time_base.den);
AVPacket pkt;
av_init_packet(&pkt);
ErlNifBinary aac;
enif_alloc_binary(4096, &aac);
pkt.data = aac.data;
pkt.size = aac.size;
pkt.dts = samplesref->pts;
int could_encode = 0;
if(avcodec_encode_audio2(enc->ctx, &pkt, samplesref, &could_encode) < 0) {
av_frame_free(&samplesref);
return error_reply(env,"Failed to encode aac");
}
if(!could_encode) {
enif_release_binary(&aac);
break;
}
av_frame_free(&samplesref);
if(!enif_realloc_binary(&aac, pkt.size)) {
return enif_make_atom(env, "failed_to_allocate_binary");
}
outframes[out_count] = enif_make_tuple2(env, enif_make_int64(env, pkt.dts), enif_make_binary(env, &aac));
out_count++;
}
if(out_count > 0) {
return enif_make_tuple2(env,
enif_make_atom(env, "ok"),
enif_make_list_from_array(env, outframes, out_count)
);
}
return enif_make_atom(env,"false");
}
static ERL_NIF_TERM
avcodec_async_encode(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {
struct Encoder *enc;
enif_get_resource(env, argv[0], encode_resource, (void **)&enc);
return enc->encoder->type == AVMEDIA_TYPE_VIDEO ? encode_video(env, argc, argv) : encode_audio(env, argc, argv);
}
static ERL_NIF_TERM
avcodec_encode(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {
if(argc < 3) return enif_make_badarg(env);
struct Encoder *enc;
if(!enif_get_resource(env, argv[0], encode_resource, (void **)&enc)) {
return enif_make_badarg(env);
}
if(enc->encoder->type == AVMEDIA_TYPE_VIDEO || enc->encoder->type == AVMEDIA_TYPE_AUDIO) {
return schedule_task(env, &enc->w, argc, argv);
} else {
return error_reply(env, "can_encode_video_or_audio");
}
}
/* $$\ $$\ $$\
$$$\ $$$ |\__|
$$$$\ $$$$ |$$\ $$$$$$$\ $$$$$$$\
$$\$$\$$ $$ |$$ |$$ _____|$$ _____|
$$ \$$$ $$ |$$ |\$$$$$$\ $$ /
$$ |\$ /$$ |$$ | \____$$\ $$ |
$$ | \_/ $$ |$$ |$$$$$$$ |\$$$$$$$\
\__| \__|\__|\_______/ \_______|
*/
static void
decode_destructor(ErlNifEnv* env, void* obj)
{
struct Decoder *dec = (struct Decoder *)obj;
stop_worker(&dec->w);
if(dec->ctx) {
enif_mutex_lock(av_open_mutex);
avcodec_close(dec->ctx);
enif_mutex_unlock(av_open_mutex);
av_free(dec->ctx);
dec->ctx = NULL;
}
if(dec->downscale_ctx) {
sws_freeContext(dec->downscale_ctx);
}
if(dec->vgraph) {
avfilter_graph_free(&dec->vgraph->filter_graph);
av_free(dec->vgraph);
}
av_frame_free(&dec->raw_frame);
}
static void
encode_destructor(ErlNifEnv* env, void* obj)
{
struct Encoder *enc = (struct Encoder *)obj;
stop_worker(&enc->w);
if(enc->ctx) {
enif_mutex_lock(av_open_mutex);
avcodec_close(enc->ctx);
enif_mutex_unlock(av_open_mutex);
av_free(enc->ctx);
}
if(enc->vgraph) {
avfilter_graph_free(&enc->vgraph->filter_graph);
av_free(enc->vgraph);
}
if(enc->agraph) {
avfilter_graph_free(&enc->agraph->filter_graph);
av_free(enc->agraph);
}
}
static int
load(ErlNifEnv* env, void** priv, ERL_NIF_TERM load_info) {
if(!decode_resource) {
decode_resource = enif_open_resource_type(env, NULL, "decode_resource", decode_destructor, ERL_NIF_RT_CREATE | ERL_NIF_RT_TAKEOVER, NULL);
}
if(!encode_resource) {
encode_resource = enif_open_resource_type(env, NULL, "encode_resource", encode_destructor, ERL_NIF_RT_CREATE | ERL_NIF_RT_TAKEOVER, NULL);
}
// av_register_all();
avcodec_register_all();
avfilter_register_all();
// av_log_set_level(AV_LOG_DEBUG);
av_open_mutex = enif_mutex_create("av_open_mutex");
return 0;
}
static int
upgrade(ErlNifEnv* env, void** priv, void** old_priv, ERL_NIF_TERM load_info) { return 0; }
static int
reload(ErlNifEnv* env, void** priv, ERL_NIF_TERM load_info) { return 0; }
static void
unload(ErlNifEnv* env, void* priv) {
// if(av_open_mutex) {
// enif_mutex_destroy(av_open_mutex);
// av_open_mutex = NULL;
// }
return;
}
static ERL_NIF_TERM
avcodec_nif_loaded(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
return enif_make_atom(env, "true");
}
static ErlNifFunc avcodec_funcs[] =
{
{"nif_loaded", 0, avcodec_nif_loaded},
{"init_decoder0", 2, avcodec_init_decoder},
{"init_decoder0", 3, avcodec_init_decoder},
{"init_encoder0", 2, avcodec_init_encoder},
#ifdef REALLY_USE_DIRTY_NIFS
{"decode0_nif", 4, avcodec_async_decode, ERL_NIF_DIRTY_JOB_CPU_BOUND},
{"encode0_nif", 4, avcodec_async_encode, ERL_NIF_DIRTY_JOB_CPU_BOUND},
#else
{"decode0_nif", 4, avcodec_decode},
{"encode0_nif", 4, avcodec_encode},
#endif
{"draw_char0_nif", 6, avcodec_draw_char},
{"close0_nif", 1, close0_nif}
};
ERL_NIF_INIT(avcodec, avcodec_funcs, load, reload, upgrade, unload)
Raw
avcodec.erl
-module(avcodec).
-on_load(load_nif/0).
-export([nif_loaded/0, load_nif/0]).
-export([init_decoder/1, init_decoder/2, init_decoder/3, decode/2, decode_stream/2]).
-export([init_encoder/1, encode/2, add_pcm_options/2]).
-export([init_thumbnailer/1, thumbnail/2]).
-export([init_decoder0/2, init_encoder0/2]).
-export([draw/3]).
-export([configure_stream/2, init_stream/2, feed_stream/2, parse_configuration/2, parse_options/1]).
-export([init_output_worker/3, encoder_loop/2]).
-export([close/1]).
-include_lib("erlmedia/include/video_frame.hrl").
-include_lib("erlmedia/include/media_info.hrl").
-include_lib("erlmedia/include/ac3.hrl").
-type decoder() :: any().
-type encoder() :: any().
-type transcoder() :: any().
% -type yuv() :: binary().
load_nif() ->
Path = case code:lib_dir(ffmpeg,priv) of
P when is_list(P) -> P;
_ -> "./priv"
end,
Load = erlang:load_nif(Path++ "/avcodec", 0),
case Load of
ok -> ok;
Error -> error_logger:error_msg("avcodec nif load error: ~p\n", [Error])
end,
ok.
nif_loaded() ->
false.
-spec init_decoder(stream_info(), binary()) -> {ok, decoder(), stream_info()}.
init_decoder(#stream_info{codec = Codec0, config = Config0, content = Content, params = Params} = SI, Spec) ->
Codec = case Codec0 of
mp2v -> mpeg2video;
mp2a -> mp2;
pcma -> pcm_alaw;
pcmu -> pcm_mulaw;
_ -> Codec0
end,
Config = if
is_binary(Config0) -> Config0;
Codec0 == pcma orelse Codec0 == pcmu ->
Channels = case Params of
#audio_params{channels = mono} -> 1;
#audio_params{channels = stereo} -> 2;
#audio_params{channels = Chans_} when is_integer(Chans_) -> Chans_;
#audio_params{channels = undefined} -> 1
end,
<<Channels:8>>;
true ->
<<>>
end,
SI1 = if
is_binary(Config0) -> video_frame:config_to_stream_info(SI, #video_frame{flavor = config, codec = Codec0, body = Config});
true -> SI
end,
case init_decoder0(Config, <<(atom_to_binary(Codec,latin1))/binary, 0>>, Spec) of
{ok, Dec} ->
case Content of
video -> {ok, Dec, SI1};
audio -> {ok, Dec, add_pcm_options(SI1,Dec)}
end;
{error, _} = E ->
E
end.
-spec init_decoder(stream_info()) -> {ok, decoder(), stream_info()}.
init_decoder(SI) ->
init_decoder(SI, <<0>>).
-spec init_decoder(stream_info(), non_neg_integer(), non_neg_integer()) -> {ok, decoder(), stream_info()}.
init_decoder(#stream_info{codec = Codec, config = Config, params = Params} = SI, Width, Height) when is_binary(Config) ->
case init_decoder0(Config, <<(atom_to_binary(Codec,latin1))/binary, 0>>, <<(iolist_to_binary(io_lib:format("scale=w=~w:h=~w:interl=-1", [Width, Height])))/binary, 0>>) of
{ok, Dec} ->
{ok, Dec, SI#stream_info{params = Params#video_params{width = Width, height = Height}}};
{error, _} = E ->
E
end;
init_decoder(#stream_info{} = SI, Width, Height) ->
init_decoder(SI#stream_info{config = <<>>}, Width, Height).
add_pcm_options(#stream_info{params = #audio_params{channels = Channels, channel_layout = Layout, sample_fmt = SampleFmt} = Params} = SI, ADec) ->
% lager:info("adec: ~p", [description(ADec)]),
Opts = lists:flatmap(fun
(<<"channel_layout=none">>) when Channels == 1 -> [{channel_layout,<<"mono">>}];
(<<"channel_layout=none">>) -> [{channel_layout,<<"stereo">>},{channels,2}];
(<<"channel_layout=",P/binary>>) -> [{channel_layout,P}];
(<<"sample_fmt=",P/binary>>) -> [{sample_fmt,P}];
(_) -> []
end, binary:split(description(ADec), <<",">>, [global])),
Or = fun
(undefined,K,L) -> proplists:get_value(K,L);
(V,_,_) when is_binary(V) -> V;
(V,_,_) when is_atom(V) -> atom_to_binary(V,latin1);
(V,channels,_) when is_integer(V) -> V
end,
Params1 = Params#audio_params{
channel_layout = Or(Layout,channel_layout,Opts),
channels = Or(Channels,channels,Opts),
sample_fmt = Or(SampleFmt,sample_fmt,Opts)
},
SI#stream_info{params = Params1}.
-spec decode(#video_frame{}, decoder()) -> [#video_frame{}] | {error, any()}.
decode(#video_frame{flavor = Fl, content = Content, body = Body, dts = InDTS, pts = InPTS} = Frame, Decoder) when Fl == keyframe orelse Fl == frame ->
ToFrame = fun
({yuv, YUV, OutPTS, W, H}) when is_binary(YUV) ->
Frame#video_frame{codec = yuv, body = YUV, next_id = {W,H}, mpegts = undefined, dts = OutPTS, pts = OutPTS};
({pcm, PCM, OutPTS}) when is_binary(PCM) andalso Content == audio ->
Frame#video_frame{codec = pcm, body = PCM, mpegts = undefined, dts = OutPTS, pts = OutPTS}
end,
case decode0(Decoder, Body, round(InDTS), round(InPTS)) of
{ok, Output} ->
[ToFrame(Out) || Out <- Output];
undefined ->
[];
false ->
{error, false};
{error, Error} ->
lager:info("failed to decode: ~p", [Error]),
{error, Error};
Tuple when is_tuple(Tuple) ->
[ToFrame(Tuple)]
end;
decode(_, _Decoder) ->
{error, not_keyframe}.
draw(Str, {X, Y}, #video_frame{codec = yuv, body = YUV, next_id = {W,H}})
when is_binary(Str), is_integer(X), is_integer(Y) ->
lists:foldl(fun(Char, Idx) ->
CharImage = draw_alphabet:char_mask(Char),
draw_char0(YUV, {X+Idx*8, Y}, {W, H}, CharImage),
Idx+1
end, 0, binary_to_list(Str)),
ok.
-record(thumbnailer, {
codec = h264,
n = 0,
decoder,
encoder
}).
init_thumbnailer(Config) when byte_size(Config) > 5 ->
init_thumbnailer(#stream_info{codec = h264, content = video, config = Config});
init_thumbnailer(#stream_info{content = video} = SI) ->
{ok, Decoder, #stream_info{params = #video_params{width = W0, height = H0}, options = Opts}} = avcodec:init_decoder(SI),
W = integer_to_binary(proplists:get_value(pixel_width, Opts, W0)),
H = integer_to_binary(proplists:get_value(pixel_height, Opts, H0)),
B = 150, % kBytes
{ok, _, Enc} = init_encoder0(<<"mjpeg", 0>>, [{width,W},{in_width,W},{height,H},{in_height,H},{b, integer_to_binary(B*8*1024)}, {sample_rate, integer_to_binary(1)}]),
{ok, #thumbnailer{decoder = Decoder, encoder = Enc}}.
thumbnail(#video_frame{} = Frame, Thumbnailer) ->
thumbnail([Frame], Thumbnailer);
thumbnail([#video_frame{}|_] = Frames, Config) when is_binary(Config) ->
{ok, Thumb} = init_thumbnailer(Config),
case thumbnail(Frames, Thumb) of
{ok, Jpeg, Thumb2} ->
close(Thumb2),
{ok, Jpeg};
Else ->
close(Thumb),
Else
end;
thumbnail([#video_frame{codec = Codec, track_id = Tid}|_] = Frames0, #thumbnailer{codec = Codec} = T) ->
Frames = [F || #video_frame{track_id = Tr} = F <- Frames0, Tr == Tid],
thumbnail0(Frames, T).
thumbnail0([Frame|Frames], #thumbnailer{decoder = Decoder, encoder = Enc, n = N} = T) ->
T1 = erlang:now(),
case decode(Frame, Decoder) of
[#video_frame{codec = yuv, body = YUV}|_] ->
T2 = erlang:now(),
{ok, _, _, _, JPEG} = encode0(Enc, YUV, N, 1),
T3 = erlang:now(),
lager:debug("thumbnail. decode: ~Bus, yuv2jpeg: ~Bus", [timer:now_diff(T2,T1), timer:now_diff(T3,T2)]),
{ok, JPEG, T#thumbnailer{n = N + 1}};
{error, _} ->
thumbnail0(Frames, T);
[] ->
thumbnail0(Frames, T)
end;
thumbnail0([], _T) ->
undefined.
-record(enc, {
codec,
config,
stream_info,
encoder
}).
-spec init_encoder(stream_info()) -> {ok, encoder(), stream_info()}.
init_encoder(#stream_info{codec = Codec, bitrate = Bitrate0, content = Content, params = Params, options = SOptions} = SI) ->
Codec1 = case Codec of
h264 -> <<"libx264">>;
jpeg -> <<"mjpeg">>;
_ -> atom_to_binary(Codec,latin1)
end,
Bitrate = if
Bitrate0 == undefined andalso Content == audio -> 64;
Bitrate0 == undefined andalso Content == video -> 700;
is_integer(Bitrate0) -> Bitrate0;
true -> error({invalid_bitrate,Bitrate0,SI})
end,
TranscoderOptions = proplists:get_value(transcoder_options, SOptions, []),
GopDuration = 3,
DefaultOptions = case proplists:get_value(crf, TranscoderOptions) of
undefined -> [{b, integer_to_binary(Bitrate*1000)}];
_ -> []
end ++ case Codec of
h264 ->
case proplists:get_value(tune, TranscoderOptions) of
undefined -> [{'rc-lookahead', integer_to_binary(GopDuration*25)}];
<<"zerolatency">> -> []
end ++
case proplists:get_value(crf, TranscoderOptions) of
undefined -> [{qmin, <<"26">>},{qmax, <<"50">>}];
_ -> []
end ++
[
{g, integer_to_binary(GopDuration*25)},
{bufsize, integer_to_binary(Bitrate*1000*GopDuration)},
{maxrate, integer_to_binary(round(Bitrate*1000*1.3))},
{bt, integer_to_binary(round(Bitrate*1000*0.7))},
{preset, <<"veryfast">>},
{threads, <<"2">>},
{profile, <<"main">>},
{level, <<"3.1">>}];
_ ->
[]
end ++ case Params of
#video_params{width = W, height = H} ->
case proplists:get_value(source, SOptions, SI) of
#stream_info{params = #video_params{width = IW0, height = IH0}, options = SrcOpts} ->
IW = proplists:get_value(pixel_width,SrcOpts,IW0),
IH = proplists:get_value(pixel_height,SrcOpts,IH0),
SAR = case {proplists:get_value(sar_width,SrcOpts),proplists:get_value(sar_height,SrcOpts)} of
{undefined,undefined} -> [];
{SarW,SarH} -> [{sar,<<(integer_to_binary(SarW))/binary, ":", (integer_to_binary(SarH))/binary>>},
{sarw,integer_to_binary(SarW)},{sarh,integer_to_binary(SarH)}]
end,
[{in_width,integer_to_binary(IW)},
{in_height,integer_to_binary(IH)},
{width,integer_to_binary(IW0)},
{height,integer_to_binary(IH0)},
{logo, proplists:get_value(logo, TranscoderOptions)}%,
%{deinterlace, integer_to_binary(proplists:get_value(deinterlace, TranscoderOptions, -1))}
] ++ SAR;
%case {IW,IH} of
% {W,H} -> [];
% _ -> [{input_width,IW},{input_height,IH}]
%end;
_ ->
[]
end ++ [{width,integer_to_binary(W)},{height,integer_to_binary(H)}];
#audio_params{channels = Ch, sample_rate = SR} ->
[{channels,integer_to_binary(Ch)},{sample_rate,integer_to_binary(SR)}] ++
case proplists:get_value(source, SOptions) of
undefined -> [];
#stream_info{} = Source -> audio_stream_options(Source)
end;
_ -> []
end,
Whitelist = [width,height,input_width,input_height],
Options0 = [{K,V} || {K,V} <- TranscoderOptions, is_binary(V) orelse lists:member(K,Whitelist)],
Options1 = Options0 ++ [{K,V} || {K,V} <- DefaultOptions, not lists:keymember(K,1,Options0)],
Options = Options1,
lager:info("Init ~s encoder with options: ~p, user: ~p", [Codec1, Options, TranscoderOptions]),
case init_encoder0(<<Codec1/binary, 0>>, Options) of
{ok, <<>>, _} when Codec == h264 ->
{error, {failed_to_init_h264_encoder}};
{ok, RawConfig, Encoder} when Codec == h264 ->
NALs = [N || N <- binary:split(RawConfig, [<<0,0,0,1>>,<<0,0,1>>], [global]), size(N) > 0],
Config = h264:video_config(NALs),
SI1 = video_frame:config_to_stream_info(SI, Config),
{ok, #enc{codec = Codec, encoder = Encoder, config = Config, stream_info = SI1}, SI1};
{ok, <<>>, Encoder} ->
{ok, #enc{codec = Codec, encoder = Encoder, stream_info = SI}, SI};
{ok, RawConfig, Encoder} ->
Config = #video_frame{content = Content, codec = Codec, flavor = config, body = RawConfig, dts = 0, pts = 0},
SI1 = video_frame:config_to_stream_info(SI, Config),
{ok, #enc{codec = Codec, encoder = Encoder, config = Config, stream_info = SI1}, SI1};
{error, Error} ->
{error, Error}
end.
audio_stream_options(#stream_info{params = #audio_params{sample_rate = SR, channel_layout = Layout, sample_fmt = SampleFmt}}) ->
[{input_channel_layout,Layout},{input_sample_fmt,SampleFmt},{input_sample_rate,integer_to_binary(SR)}].
-spec encode(#video_frame{}, encoder()) -> [#video_frame{}].
% encode(#video_frame{codec = pcm, flavor = frame, body = PCM, dts = InDTS, next_id = #pcm{} = Info} = F, #enc{codec = Codec, encoder = Encoder}) ->
% #pcm{rate = Rate, samples = Samples, channel_layout = ChannelLayout, sample_fmt = SampleFmt, bps = BytesPerSample} = Info,
% ok;
encode(#video_frame{codec = InCodec, flavor = Flavor, dts = InDTS, body = Body} = F,
#enc{codec = Codec, encoder = Encoder, stream_info =
#stream_info{content = Content, params = Params}})
when (Flavor == keyframe orelse Flavor == frame) andalso (InCodec == yuv orelse InCodec == pcm) ->
Rate = case Params of
#audio_params{sample_rate = SR} -> SR;
_ -> undefined
end,
InDTS1 = case Content of
audio -> round(InDTS*Rate / 1000);
video -> round(InDTS)
end,
KFlag = case Flavor of
keyframe -> 1;
frame -> 0
end,
case encode0(Encoder, Body, InDTS1, KFlag) of
undefined ->
[];
false ->
[];
{ok, <<>>} ->
undefined;
{ok, OutFlavor, OutDTS, OutPTS, Bin} when Codec == h264 ->
NALs = [N || N <- binary:split(Bin, [<<0,0,0,1>>,<<0,0,1>>], [global]), size(N) > 0],
% Types = [T || <<_:3, T:5, _/binary>> <- NALs],
% OutFlavor = case lists:member(5, Types) of
% true -> keyframe;
% _ -> frame
% end,
H264 = iolist_to_binary([ [<<(size(NAL)):32>>,NAL] || NAL <- NALs]),
[F#video_frame{codec = Codec, flavor = OutFlavor, body = H264, dts = OutDTS, pts = OutPTS, next_id = undefined}];
{ok, OutFlavor, OutDTS, OutPTS, Bin} ->
[F#video_frame{codec = Codec, flavor = OutFlavor, body = Bin, dts = OutDTS, pts = OutPTS, next_id = undefined}];
{ok, _OutPTS, Bin} when Codec =/= h264 ->
[F#video_frame{codec = Codec, body = Bin, next_id = undefined}];
{ok, Packets} when is_list(Packets) andalso Content == audio ->
[F#video_frame{codec = Codec, body = Bin, next_id = undefined, dts = PTS*1000 / Rate, pts = PTS*1000 / Rate} || {PTS, Bin} <- Packets];
{ok, Packets} when is_list(Packets) andalso Content == video andalso Codec == h264 ->
lists:map(fun({ok, OutFlavor, OutDTS, OutPTS, Bin}) ->
NALs = [N || N <- binary:split(Bin, [<<0,0,0,1>>,<<0,0,1>>], [global]), size(N) > 0],
H264 = iolist_to_binary([ [<<(size(NAL)):32>>,NAL] || NAL <- NALs]),
F#video_frame{codec = Codec, flavor = OutFlavor, body = H264, dts = OutDTS, pts = OutPTS, next_id = undefined} end, Packets);
{ok, Packets} when is_list(Packets) andalso Content == video ->
[F#video_frame{codec = Codec, flavor = OutFlavor, body = Bin, next_id = undefined, dts = OutDTS, pts = OutPTS} || {ok, OutFlavor, OutDTS, OutPTS, Bin} <- Packets];
{error, E} ->
lager:error("Error ~p in encoder ~p", [E, Codec]),
{error, E}
end.
parse_options(S) when is_binary(S) -> parse_options(binary_to_list(S));
parse_options([]) -> [];
parse_options([{_,_}|_] = S) -> S;
parse_options(Line) ->
Opts = [O || O <- string:tokens(Line, " "), length(O) > 0],
ToI = fun
("copy") -> copy;
(S) -> case re:run(S, "(\\d+)k", [{capture,all_but_first,list}]) of
{match, [S_]} -> list_to_integer(S_)*1000;
_ -> list_to_integer(S)
end end,
Options = lists:map(fun(O) ->
[K,V] = string:tokens(O, "="),
case K of
"vb" -> {video_bitrate, ToI(V)};
"ab" -> {audio_bitrate, ToI(V)};
_ -> {list_to_atom(K), list_to_binary(V)}
end
end, Opts),
Options.
-type transcoder_option() ::
{video_bitrate, non_neg_integer()} |
{audio_bitrate, non_neg_integer()}.
-spec parse_configuration(InputMI::media_info(), [transcoder_option()]) -> {ok, media_info()}.
parse_configuration(#media_info{streams = IStreams0} = InputMI, Options0) ->
Options = parse_options(Options0),
IStreams = [S || #stream_info{content = C} = S <- IStreams0, C == audio orelse C == video],
VStreams = parse_video_config(Options, lists:keyfind(video, #stream_info.content, IStreams), undefined),
ABitrate = case proplists:get_value(audio_bitrate, Options) of
Num1 when Num1 - 10000 > 0 -> Num1 div 1000;
Num1 -> Num1
end,
ACodec = proplists:get_value(audio_codec, Options, aac),
AStreams = lists:flatmap(fun
(#stream_info{content = video}) ->
[];
(#stream_info{content = audio, codec = AC, options = SOpts, track_id = T, params = #audio_params{} = AParams} = SI) ->
[SI#stream_info{bitrate = ABitrate, codec = case ACodec of copy -> AC; _ -> ACodec end,
params = AParams#audio_params{
channels = case AParams#audio_params.channels of
1 -> 1;
_ -> 2
end
},
options = SOpts ++ [{source_track_id,T}]}];
(#stream_info{} = SI) ->
[SI]
end, IStreams),
OStreams1 = VStreams ++ AStreams,
OStreams2 = lists:zipwith(fun(N,S) -> S#stream_info{track_id = N} end, lists:seq(1,length(OStreams1)), OStreams1),
OutputMI = InputMI#media_info{streams = OStreams2},
{ok, OutputMI}.
parse_video_config([{audio_bitrate,_}|Options], Input, Output) ->
parse_video_config(Options, Input, Output);
parse_video_config([], _Input, undefined) -> [];
parse_video_config([], _Input, Output) -> [Output];
parse_video_config([{video_bitrate, _}|_] = Options, Input, #stream_info{} = Output) ->
[Output|parse_video_config(Options, Input, undefined)];
parse_video_config([{video_bitrate, copy}|Options], #stream_info{options = Opts, track_id = T} = I, undefined) ->
parse_video_config(Options, I, I#stream_info{options = Opts ++ [{source_track_id,T},{copy,true}]});
parse_video_config([{video_bitrate, VB}|Options], #stream_info{track_id = T, options = Opts} = I, undefined) ->
parse_video_config(Options, I, I#stream_info{bitrate = VB div 1000, codec = h264, options = Opts ++ [{source_track_id,T}]});
parse_video_config([{size, S}|Options], I, #stream_info{params = #video_params{} = Params} = O) ->
[W_, H_] = binary:split(S, <<"x">>),
W = binary_to_integer(W_),
H = binary_to_integer(H_),
parse_video_config(Options, I, O#stream_info{params = Params#video_params{width = W, height = H}});
parse_video_config([{K, V}|Options], I, #stream_info{options = Opts} = O) when is_atom(K), is_binary(V) ->
parse_video_config(Options, I, O#stream_info{options = tc_opt(Opts, [{K,V}])});
parse_video_config([_|Options], I, O) ->
parse_video_config(Options, I, O).
tc_opt(Options, TCOpts) ->
TC1 = proplists:get_value(transcoder_options, Options, []),
lists:keystore(transcoder_options, 1, Options, {transcoder_options, TC1 ++ TCOpts}).
-spec configure_stream(InputMI::media_info(), [transcoder_option()]) -> {ok, transcoder(), media_info()}.
configure_stream(#media_info{options = InputOpts} = InputMI, Options) ->
{ok, OutputMI} = parse_configuration(InputMI, Options),
Deinterlace = case proplists:get_value(deinterlace, Options) of
undefined -> [];
_ -> [{deinterlace,true}]
end,
{ok, TC, OutputMI2} = avcodec:init_stream(InputMI#media_info{options = InputOpts ++ Deinterlace}, OutputMI),
{ok, TC, OutputMI2}.
-record(stream, {
media_info,
buffer,
inputs = [],
outputs = []
}).
-record(input, {
n,
frame_duration,
first_pts,
track,
decoder,
stream_info,
previous
}).
init_decoder_for_stream(SI, Deinterlace) when Deinterlace ->
init_decoder(SI, <<"yadif=0:-1:0", 0>>);
init_decoder_for_stream(SI, _) ->
init_decoder(SI).
-spec init_stream(Input::media_info(), Output::media_info()) -> {ok, transcoder(), media_info()}.
init_stream(#media_info{streams = IStreams, options = InputOpts}, #media_info{streams = OStreams} = OutMI) ->
Inputs0 = [begin
{ok, Dec, SI1} = init_decoder_for_stream(SI, proplists:get_value(deinterlace, InputOpts)),
FrameDuration = if
Content == video -> 40; % 25 FPS
Codec == aac -> 1024*1000 / SI1#stream_info.params#audio_params.sample_rate;
Codec == ac3 -> SI1#stream_info.params#audio_params.samples*1000 / SI1#stream_info.params#audio_params.sample_rate;
Codec == mp2a -> SI1#stream_info.params#audio_params.samples*1000 / SI1#stream_info.params#audio_params.sample_rate;
Codec == mp3 -> SI1#stream_info.params#audio_params.samples*1000 / SI1#stream_info.params#audio_params.sample_rate;
true -> undefined
end,
#input{track = Track, decoder = Dec, stream_info = SI1, frame_duration = FrameDuration
}
end || #stream_info{track_id = Track, content = Content, codec = Codec} = SI <- IStreams, Content == video orelse Content == audio],
% We are looking into source_track_id option if we need stream remapping
% when we want to encode one input video to several outputs.
% So we will have several outputs with one source_track_id
Outputs = [begin
InputTrackId = proplists:get_value(source_track_id,SOptions,Track),
case proplists:get_value(copy, SOptions) of
true ->
{InputTrackId, copy, Track, SI};
_ ->
#input{stream_info = InputSI} = lists:keyfind(InputTrackId, #input.track, Inputs0),
SI2 = SI#stream_info{options = SOptions ++ [{source,InputSI}]},
MD = lager:md(),
case proc_lib:start_link(?MODULE, init_output_worker, [self(), SI2, MD]) of
{ok, Worker, OutputSI} ->
{InputTrackId, Worker, Track, OutputSI};
{error, E} ->
error({E,SI2})
end
end
end || #stream_info{track_id = Track, options = SOptions} = SI <- OStreams],
Inputs1 = [Input || #input{track = Track} = Input <- Inputs0, lists:keyfind(Track,#input.track,Inputs0) =/= false],
OStreams2 = [begin
{_, _, _, OutputSI} = lists:keyfind(Track, 3, Outputs),
OutputSI
end || #stream_info{track_id = Track} <- OStreams],
OutMI2 = OutMI#media_info{streams = OStreams2},
{ok, #stream{inputs = Inputs1, outputs = Outputs, media_info = OutMI2}, OutMI2}.
init_output_worker(Parent, SI2, MD) ->
lager:md(MD),
erlang:monitor(process, Parent),
case init_encoder(SI2) of
{ok, Encoder, OutputSI} ->
proc_lib:init_ack({ok, self(), OutputSI}),
proc_lib:hibernate(?MODULE, encoder_loop, [Parent, Encoder]);
{error, E} ->
proc_lib:init_ack({error, E})
end.
encoder_loop(Parent, Encoder) ->
Msg = receive M -> M end,
case Msg of
#video_frame{} = Raw ->
try encode(Raw, Encoder) of
{error, EncodeError} ->
lager:error("Encoder worker is failing with error: ~p", [EncodeError]),
error(EncodeError);
Reply -> Parent ! {self(), Reply}
catch
C:E ->
ST = erlang:get_stacktrace(),
lager:error("Encoder worker failed: ~p:~p\n~p", [C, E, ST]),
exit(normal)
end;
{'DOWN', _, _, Parent, Reason} ->
lager:info("encoder is exiting due to parent death: ~p", [Reason]),
exit(normal);
Else ->
lager:info("Bad message to worker: ~p", [Else])
end,
proc_lib:hibernate(?MODULE, encoder_loop, [Parent, Encoder]).
-spec feed_stream(video_frame(), transcoder()) -> {ok, [video_frame()], transcoder()}.
feed_stream(#video_frame{track_id = Track} = F, #stream{outputs = Outputs} = Stream) ->
case [{Enc, OutTrack} || {T,Enc,OutTrack,_} <- Outputs, T == Track] of
[{copy, OutTrack}] ->
buffer_frames([F#video_frame{track_id = OutTrack}], Stream);
_ ->
feed_stream0(F, Stream)
end;
feed_stream([#video_frame{}=F|Frames], #stream{} = Stream) ->
{ok, Out, Stream2} = feed_stream(F,Stream),
{ok, OFrames, Stream3} = feed_stream(Frames, Stream2),
{ok, Out ++ OFrames, Stream3};
feed_stream([], #stream{} = Stream) ->
{ok, [], Stream}.
feed_stream0(#video_frame{} = F, #stream{} = Stream) ->
case decode_stream(F, Stream) of
{ok, RawFrames, Stream1} ->
% put(last_input, {F#video_frame.codec, round(F#video_frame.dts)}),
encode_raw_frames(RawFrames, #video_frame{} = F, Stream1);
{error, _, Stream1} ->
{ok, [], Stream1}
end.
encode_raw_frames([], _, Stream1) ->
{ok, [], Stream1};
encode_raw_frames([#video_frame{track_id = Track} = Raw0|RawFrames], #video_frame{} = F, #stream{outputs = Outputs} = Stream1) ->
% case get(frog) of
% undefined ->
% #stream_info{params = #video_params{width = W, height = H}} =
% lists:keyfind(Track, #stream_info.track_id, Stream#stream.media_info#media_info.streams),
% {ok, Fr0} = frog:init(W, H, 0.5),
% put(frog, Fr0);
% _ -> ok
% end,
% Zones = frog:detect(Raw0, get(frog)),
% Raw = frog:highlight(Zones, Raw0),
%% draw(<<"test 123. !@#$%^&*(){}\\\"<>?+',./=-_;:">>, {10, 10}, Raw0),
%% draw(<<"abcdefghijklmnopqrstuvxyz">>, {10, 20}, Raw0),
%% draw(<<"ABCDEFGHIJKLMNOPQRSTUVXYZ">>, {10, 30}, Raw0),
Raw = Raw0,
Encoders = [{Enc, OutTrack} || {T,Enc,OutTrack,_} <- Outputs, T == Track],
[Enc ! Raw || {Enc, _} <- Encoders, is_pid(Enc)],
OutputFrames = lists:flatmap(fun
({copy,OutTrack}) ->
[F#video_frame{track_id = OutTrack}];
({Enc,OutTrack}) ->
Ref = erlang:monitor(process, Enc),
Encoded = receive
{Enc, Encoded_} -> Encoded_;
{'DOWN', Ref, process, Enc, Reason} -> error({encoder_failed,OutTrack,Reason})
end,
erlang:demonitor(Ref, [flush]),
case Encoded of
#video_frame{} = Out -> [Out#video_frame{track_id = OutTrack}];
[] -> [];
Out when is_list(Out) ->
% case F#video_frame.codec of
% h264 ->
% lager:info("Stream: (~p) -> ~p -> ~p", [round(F#video_frame.dts), round(Raw0#video_frame.dts), [ round(O#video_frame.dts) || O <- Out] ]);
% _ -> ok
% end,
[OF#video_frame{track_id = OutTrack} || OF <- Out];
undefined -> [];
{error, E} -> lager:info("Encoder on track ~p got error ~p", [OutTrack, E]), []
end
end, Encoders),
{ok, OutFrames2, Stream2} = buffer_frames(OutputFrames, Stream1),
% lager:info("~p ~p(~p) -> ~p -> ~p", [ get(last_input), Raw0#video_frame.codec, round(Raw0#video_frame.dts),
% [ {C,round(D)} || #video_frame{dts = D, codec = C} <- OutputFrames ],
% [ {C,round(D)} || #video_frame{dts = D, codec = C} <- OutFrames2 ]
% ]),
{ok, OutFrames3, Stream3} = encode_raw_frames(RawFrames, F, Stream2),
{ok, OutFrames2 ++ OutFrames3, Stream3};
encode_raw_frames(#video_frame{} = Raw, #video_frame{} = F, Stream) ->
encode_raw_frames([Raw], F, Stream).
-spec decode_stream(#video_frame{}, #stream{}) -> {ok, [#video_frame{}], #stream{}} | {error, any(), #stream{}}.
decode_stream(#video_frame{track_id = Track} = F, #stream{inputs = Inputs} = Stream) ->
case lists:keyfind(Track, #input.track, Inputs) of
false ->
{error, no_stream, Stream};
#input{decoder = Dec, previous = Prev, n = N, frame_duration = Duration, first_pts = FPTS} = Input ->
case decode(F, Dec) of
[#video_frame{content = video}|_] = Raw ->
{ok, Raw, Stream#stream{inputs = lists:keystore(Track, #input.track, Inputs, Input#input{previous = Raw})}};
[#video_frame{content = audio, dts = DTS} = Raw] when Prev == undefined ->
Silence = Raw#video_frame{body = binary:copy(<<0>>, size(Raw#video_frame.body))},
Input1 = Input#input{previous = Silence, n = 1, first_pts = DTS},
{ok, [Raw], Stream#stream{inputs = lists:keystore(Track, #input.track, Inputs, Input1)}};
[#video_frame{content = audio, dts = DTS0} = Raw] ->
DTS1 = if
is_number(Duration) -> N*Duration + FPTS;
true -> DTS0
end,
Threshold = 10,
if
Duration == undefined orelse DTS0 - DTS1 =< Threshold*Duration ->
Input1 = Input#input{n = N+1},
{ok, [Raw#video_frame{dts = DTS1, pts = DTS1}], Stream#stream{inputs = lists:keystore(Track, #input.track, Inputs, Input1)}};
DTS0 - DTS1 > Threshold*5*Duration ->
lager:info("reset audio sync"),
Input1 = Input#input{n = 1, first_pts = DTS0},
{ok, [Raw#video_frame{dts = DTS0, pts = DTS0}], Stream#stream{inputs = lists:keystore(Track, #input.track, Inputs, Input1)}};
DTS0 - DTS1 > Threshold*Duration ->
Output = [Raw#video_frame{dts = DTS1, pts = DTS1},
Prev#video_frame{dts = DTS1 + Duration, pts = DTS1 + Duration},
Prev#video_frame{dts = DTS1 + 2*Duration, pts = DTS1 + 2*Duration}],
lager:info("compensating audio drop with 2 silence frames. dts=~p, waiting for=~p", [round(DTS0), round(DTS1)]),
Input1 = Input#input{n = N+3},
{ok, Output, Stream#stream{inputs = lists:keystore(Track, #input.track, Inputs, Input1)}};
true ->
error({strange_timestamps,DTS0,DTS1,N,Duration,FPTS})
end;
[#video_frame{}|_] = Raw ->
{ok, Raw, Stream};
[] ->
{ok, [], Stream};
% {error, _} when Prev =/= undefined ->
% lager:debug("Failed to decode frame ~s(~B) ~B, compensating", [F#video_frame.codec, Track, round(F#video_frame.dts)]),
% {ok, Prev#video_frame{dts = F#video_frame.dts, pts = F#video_frame.pts}, Stream};
{error, not_avdecoded} ->
{error, no_frame, Stream};
{error, _E} ->
lager:debug("Failed to decode frame ~s(~B) ~B: ~p", [F#video_frame.codec, Track, round(F#video_frame.dts), _E]),
{error, failed_to_decode, Stream};
undefined ->
{error, no_frame, Stream}
end
end.
buffer_frames([], Stream) ->
{ok, [], Stream};
buffer_frames(OutputFrames, #stream{buffer = undefined} = Stream) ->
buffer_frames(OutputFrames, Stream#stream{buffer = frame_queue:init()});
buffer_frames(OutputFrames, #stream{buffer = Buffer} = Stream) ->
{Frames, Buffer1} = frame_queue:push(OutputFrames, Buffer),
{ok, Frames, Stream#stream{buffer = Buffer1}}.
close(#thumbnailer{decoder = D, encoder = E}) ->
close(D),
close(E),
ok;
close(Port) ->
close0_nif(Port).
close0_nif(_Port) -> erlang:nif_error(not_implemented).
init_decoder0(_Config,_Codec) -> erlang:nif_error(not_implemented).
init_decoder0(_Config,_Codec,_Spec) -> erlang:nif_error(not_implemented).
description(Decoder) -> Decoder.
decode0_nif(_Decoder, _Encoded, _DTS, _PTS) -> erlang:nif_error(not_implemented).
decode0(Decoder, Encoded, DTS, PTS) ->
case decode0_nif(Decoder, Encoded, DTS, PTS) of
{ref, Ref} ->
receive
{Ref, Reply} -> Reply
after
3000 -> error(decode_timeout)
end;
Reply ->
Reply
end.
init_encoder0(_Codec,_Opts) -> erlang:nif_error(not_implemented).
encode0_nif(_Encoder,_Body,_DTS,_IsKeyframe) -> erlang:nif_error(not_implemented).
encode0(Encoder,Body,DTS,IsKeyframe) when is_number(DTS) ->
case encode0_nif(Encoder,Body,round(DTS),IsKeyframe) of
{ref, Ref} ->
receive
{Ref, Reply} -> Reply
after
3000 -> error(decode_timeout)
end;
Reply ->
Reply
end.
draw_char0_nif(_Body, _X, _Y, _W, _H, _Str) -> erlang:nif_error(not_implemented).
draw_char0(Body, {X, Y}, {W, H}, Str) ->
draw_char0_nif(Body,X,Y,W,H,Str).
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