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@Lovesan

Lovesan/ffexample.c

Last active Jun 6, 2020
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What would you like to do?
FFmpeg-based console audio/video player (e.g. ffplay analogue)
// build like e.g.
// cl.exe /nologo /O2 /I../ffmpeg-3.2.2-win64-lgpl/include /I../SDL2-2.0.5/include /MT ffexample.c SDL2.lib avcodec.lib avdevice.lib avformat.lib avutil.lib swresample.lib swscale.lib /link /libpath:../SDL2-2.0.5/lib/x64 /libpath:../ffmpeg-3.2.2-win64-lgpl/lib
#define __STDC_CONSTANT_MACROS
#ifndef UNICODE
#define UNICODE
#endif
#ifndef _UNICODE
#define _UNICODE
#endif
#ifndef WINVER
#define WINVER 0x0601
#endif
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0601
#endif
#include <stdint.h>
#include <inttypes.h>
#include <windows.h>
#include <stdio.h>
#ifdef _MSC_VER
#define ALIGN_16(T, F) __declspec(align(16)) T F;
#else
#define ALIGN_16(T, F) T F __attribute__((aligned(16)));
#endif
#ifdef __cplusplus
extern "C"
{
#endif
#include <libavfilter/avfilter.h>
#include <libavformat/avformat.h>
#include <libavcodec/avcodec.h>
#include <libavdevice/avdevice.h>
#include <libavutil/imgutils.h>
#include <libavutil/avstring.h>
#include <libavutil/time.h>
#include <libswresample/swresample.h>
#include <libswscale/swscale.h>
#define SDL_MAIN_HANDLED
#include <SDL.h>
#include <SDL_thread.h>
#include <SDL_syswm.h>
#include <SDL_render.h>
#include <SDL_audio.h>
#ifdef __cplusplus
}
#endif
#define FF_ALLOC_EVENT (SDL_USEREVENT)
#define FF_REFRESH_EVENT (SDL_USEREVENT + 1)
#define FF_QUIT_EVENT (SDL_USEREVENT + 2)
#define MAX_QUEUE_SIZE (15 * 1024 * 1024)
#define VIDEO_PICTURE_QUEUE_SIZE (1)
#define SDL_AUDIO_BUFFER_SIZE 1024
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000
#define AV_SYNC_THRESHOLD 0.01
#define AV_NOSYNC_THRESHOLD 10.0
typedef struct _PacketQueue
{
AVPacketList *first, *last;
int nb_packets, size;
CRITICAL_SECTION cs;
CONDITION_VARIABLE cv;
} PacketQueue;
typedef struct _VideoPicture
{
SDL_Texture * texture;
int width, height;
int allocated;
double pts;
} VideoPicture;
typedef struct _VideoState
{
ALIGN_16(uint8_t, audioBuf[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2])
ALIGN_16(uint8_t, audioConvertedData[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2])
ALIGN_16(AVPacket, audioPkt)
ALIGN_16(AVPacket, videoPkt)
AVFormatContext * pFormatCtx;
AVCodecContext * audioCtx;
AVCodecContext * videoCtx;
struct SwrContext * pSwrCtx;
struct SwsContext * pSwsCtx;
int videoStream, audioStream;
AVStream * audioSt;
PacketQueue audioq;
unsigned int audioBufSize, audioBufIndex;
int hasAudioFrames;
AVFrame * pAudioFrame;
AVFrame * pFrameRGB;
uint8_t * pFrameBuffer;
AVStream * videoSt;
PacketQueue videoq;
VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
int pictqSize, pictqRindex, pictqWindex;
CRITICAL_SECTION pictqCs;
CONDITION_VARIABLE pictqCv;
HANDLE hParseThread;
HANDLE hVideoThread;
SDL_Window * window;
SDL_Renderer * renderer;
char filename[1024];
int quit;
double videoClock, audioClock, lastFramePts, lastFrameDelay, frameTimer;
} VideoState;
VideoState * global_video_state;
void PacketQueueInit(PacketQueue * pq)
{
memset(pq, 0, sizeof(PacketQueue));
InitializeCriticalSection(&pq->cs);
InitializeConditionVariable(&pq->cv);
}
int PacketQueuePut(PacketQueue * pq, const AVPacket * srcPkt)
{
AVPacketList *elt;
AVPacket pkt;
int rv;
if (!pq) return -1;
rv = av_packet_ref(&pkt, srcPkt);
if (rv) return rv;
elt = (AVPacketList*)av_malloc(sizeof(AVPacketList));
if (!elt) return -1;
elt->pkt = pkt;
elt->next = NULL;
EnterCriticalSection(&pq->cs);
if (!pq->last)
pq->first = elt;
else
pq->last->next = elt;
pq->last = elt;
pq->nb_packets++;
pq->size += elt->pkt.size;
WakeConditionVariable(&pq->cv);
LeaveCriticalSection(&pq->cs);
return 0;
}
int PacketQueueGet(PacketQueue *pq, AVPacket *pkt, int block)
{
AVPacketList * elt;
int rv;
if (!pq || !pkt) return -1;
EnterCriticalSection(&pq->cs);
for (;;)
{
if (global_video_state->quit)
{
rv = -1;
break;
}
elt = pq->first;
if (elt)
{
pq->first = elt->next;
if (!pq->first)
pq->last = NULL;
pq->nb_packets--;
pq->size -= elt->pkt.size;
*pkt = elt->pkt;
av_free(elt);
rv = 1;
break;
}
else if (!block)
{
rv = 0;
break;
}
else
{
SleepConditionVariableCS(&pq->cv, &pq->cs, INFINITE);
}
}
LeaveCriticalSection(&pq->cs);
return rv;
}
int DecodeAudioFrame(VideoState * is, double * ptsPtr)
{
int n, dataSize = 0, outSize = 0, rv, hasPacket = 0;
uint8_t * converted = &is->audioConvertedData[0];
double pts;
for (;;)
{
while (is->hasAudioFrames) {
rv = avcodec_receive_frame(is->audioCtx, is->pAudioFrame);
if (rv)
{
is->hasAudioFrames = 0;
break;
}
dataSize = av_samples_get_buffer_size(NULL,
is->audioCtx->channels,
is->pAudioFrame->nb_samples,
is->audioCtx->sample_fmt,
1);
outSize = av_samples_get_buffer_size(NULL,
is->audioCtx->channels,
is->pAudioFrame->nb_samples,
AV_SAMPLE_FMT_FLT,
1);
swr_convert(is->pSwrCtx,
&converted,
is->pAudioFrame->nb_samples,
(const uint8_t**)&is->pAudioFrame->data[0],
is->pAudioFrame->nb_samples);
memcpy(is->audioBuf, converted, outSize);
dataSize = outSize;
pts = is->audioClock;
*ptsPtr = pts;
n = sizeof(float) * is->audioCtx->channels;
is->audioClock += (double)outSize / (double)(n * is->audioCtx->sample_rate);
/* We have data, return it and come back for more later */
return dataSize;
}
if (hasPacket)
{
av_packet_unref(&is->audioPkt);
}
if (is->quit)
return -1;
if (PacketQueueGet(&is->audioq, &is->audioPkt, 1) < 0)
return -1;
if (is->audioPkt.pts != AV_NOPTS_VALUE)
{
is->audioClock = av_q2d(is->audioSt->time_base)*is->audioPkt.pts;
}
hasPacket = 1;
rv = avcodec_send_packet(is->audioCtx, &is->audioPkt);
if (rv) return rv;
is->hasAudioFrames = 1;
}
return -1;
}
void AudioCallback(void *userdata, uint8_t * stream, int len)
{
VideoState * is = (VideoState*)userdata;
int len1, audioSize;
double pts;
while (len > 0)
{
if (is->audioBufIndex >= is->audioBufSize)
{
// already sent all data; get more
audioSize = DecodeAudioFrame(is, &pts);
if (audioSize < 0)
{
// error
is->audioBufSize = SDL_AUDIO_BUFFER_SIZE;
memset(is->audioBuf, 0, sizeof(is->audioBuf));
}
else
{
is->audioBufSize = audioSize;
}
is->audioBufIndex = 0;
}
len1 = is->audioBufSize - is->audioBufIndex;
if (len1 > len)
len1 = len;
memcpy(stream, (uint8_t *)is->audioBuf + is->audioBufIndex, len1);
len -= len1;
stream += len1;
is->audioBufIndex += len1;
}
}
void AllocPicture(void* userData)
{
VideoState * is = (VideoState*)userData;
VideoPicture * vp;
vp = &is->pictq[is->pictqWindex];
if (vp->texture)
{
SDL_DestroyTexture(vp->texture);
}
vp->texture = SDL_CreateTexture(is->renderer,
SDL_PIXELFORMAT_RGB24,
SDL_TEXTUREACCESS_STREAMING,
is->videoCtx->width,
is->videoCtx->height);
vp->width = is->videoCtx->width;
vp->height = is->videoCtx->height;
EnterCriticalSection(&is->pictqCs);
vp->allocated = 1;
WakeConditionVariable(&is->pictqCv);
LeaveCriticalSection(&is->pictqCs);
}
int QueuePicture(VideoState* is, AVFrame* frame, double pts)
{
VideoPicture * vp;
EnterCriticalSection(&is->pictqCs);
while (is->pictqSize >= VIDEO_PICTURE_QUEUE_SIZE && !is->quit)
{
SleepConditionVariableCS(&is->pictqCv, &is->pictqCs, INFINITE);
}
LeaveCriticalSection(&is->pictqCs);
if (is->quit)
return -1;
vp = &is->pictq[is->pictqWindex];
if (!vp->texture || vp->width != is->videoCtx->width || vp->height != is->videoCtx->height)
{
SDL_Event evt;
vp->allocated = 0;
evt.type = FF_ALLOC_EVENT;
evt.user.data1 = is;
SDL_PushEvent(&evt);
EnterCriticalSection(&is->pictqCs);
while (!vp->allocated && !is->quit)
{
SleepConditionVariableCS(&is->pictqCv, &is->pictqCs, INFINITE);
}
LeaveCriticalSection(&is->pictqCs);
if (is->quit)
return -1;
}
if (vp->texture)
{
sws_scale(is->pSwsCtx,
(const uint8_t * const *)(&frame->data[0]),
frame->linesize,
0,
is->videoCtx->height,
is->pFrameRGB->data,
is->pFrameRGB->linesize);
SDL_UpdateTexture(vp->texture, NULL, is->pFrameRGB->data[0], is->pFrameRGB->linesize[0]);
vp->pts = pts;
if (++is->pictqWindex == VIDEO_PICTURE_QUEUE_SIZE)
{
is->pictqWindex = 0;
}
EnterCriticalSection(&is->pictqCs);
is->pictqSize++;
LeaveCriticalSection(&is->pictqCs);
}
return 0;
}
double SyncVideo(VideoState * is, AVFrame * frame, double pts)
{
double frameDelay;
if (pts != 0)
{
is->videoClock = pts;
}
else
{
pts = is->videoClock;
}
frameDelay = av_q2d(is->videoSt->time_base);
frameDelay += frame->repeat_pict * (frameDelay * 0.5);
is->videoClock += frameDelay;
return pts;
}
unsigned __stdcall VideoThread(void* pUserData)
{
VideoState * is = (VideoState*)pUserData;
int rv;
AVFrame *pFrame = NULL;
double pts;
pFrame = av_frame_alloc();
while (PacketQueueGet(&is->videoq, &is->videoPkt, 1) > 0)
{
rv = avcodec_send_packet(is->videoCtx, &is->videoPkt);
if (rv < 0) continue;
while (!avcodec_receive_frame(is->videoCtx, pFrame))
{
if (is->videoPkt.dts != AV_NOPTS_VALUE)
{
pts = (double)av_frame_get_best_effort_timestamp(pFrame);
}
else
{
pts = 0;
}
pts *= av_q2d(is->videoSt->time_base);
pts = SyncVideo(is, pFrame, pts);
if (QueuePicture(is, pFrame, pts) < 0)
{
break;
}
}
av_packet_unref(&is->videoPkt);
}
av_frame_free(&pFrame);
return 0;
}
int StreamComponentOpen(VideoState * is, int streamIndex)
{
AVFormatContext * pFormatCtx = is->pFormatCtx;
AVCodecContext * codecCtx;
AVCodec * codec;
AVCodecParameters * codecPar;
SDL_AudioSpec wantedSpec = { 0 }, audioSpec = {0};
int rv, rgbFrameSize;
if (streamIndex < 0 || streamIndex >= (int)pFormatCtx->nb_streams)
return -1;
codecPar = pFormatCtx->streams[streamIndex]->codecpar;
codec = avcodec_find_decoder(codecPar->codec_id);
if (!codec) return -1;
codecCtx = avcodec_alloc_context3(codec);
if (!codecCtx) return -1;
rv = avcodec_parameters_to_context(codecCtx, codecPar);
if (rv < 0)
{
avcodec_free_context(&codecCtx);
return rv;
}
rv = avcodec_open2(codecCtx, codec, NULL);
if (rv < 0)
{
avcodec_free_context(&codecCtx);
return rv;
}
if (codecPar->codec_type == AVMEDIA_TYPE_AUDIO)
{
is->audioCtx = codecCtx;
is->audioStream = streamIndex;
is->audioBufSize = 0;
is->audioBufIndex = 0;
is->audioSt = pFormatCtx->streams[streamIndex];
memset(&is->audioPkt, 0, sizeof(is->audioPkt));
is->pAudioFrame = av_frame_alloc();
if (!is->pAudioFrame) return -1;
is->pSwrCtx = swr_alloc();
if (!is->pSwrCtx) return -1;
if (codecCtx->channel_layout)
{
av_opt_set_channel_layout(is->pSwrCtx, "in_channel_layout", codecCtx->channel_layout, 0);
av_opt_set_channel_layout(is->pSwrCtx, "out_channel_layout", codecCtx->channel_layout, 0);
}
else if (codecCtx->channels == 2)
{
av_opt_set_channel_layout(is->pSwrCtx, "in_channel_layout", AV_CH_LAYOUT_STEREO, 0);
av_opt_set_channel_layout(is->pSwrCtx, "out_channel_layout", AV_CH_LAYOUT_STEREO, 0);
}
else if(codecCtx->channels == 1)
{
av_opt_set_channel_layout(is->pSwrCtx, "in_channel_layout", AV_CH_LAYOUT_MONO, 0);
av_opt_set_channel_layout(is->pSwrCtx, "out_channel_layout", AV_CH_LAYOUT_MONO, 0);
}
else
{
av_opt_set_channel_layout(is->pSwrCtx, "in_channel_layout", AV_CH_LAYOUT_NATIVE, 0);
av_opt_set_channel_layout(is->pSwrCtx, "out_channel_layout", AV_CH_LAYOUT_NATIVE, 0);
}
av_opt_set_int(is->pSwrCtx, "in_sample_rate", codecCtx->sample_rate, 0);
av_opt_set_int(is->pSwrCtx, "out_sample_rate", codecCtx->sample_rate, 0);
av_opt_set_sample_fmt(is->pSwrCtx, "in_sample_fmt", codecCtx->sample_fmt, 0);
av_opt_set_sample_fmt(is->pSwrCtx, "out_sample_fmt", AV_SAMPLE_FMT_FLT, 0);
rv = swr_init(is->pSwrCtx);
if (rv < 0) return rv;
wantedSpec.channels = codecCtx->channels;
wantedSpec.freq = codecCtx->sample_rate;
wantedSpec.format = AUDIO_F32;
wantedSpec.silence = 0;
wantedSpec.samples = SDL_AUDIO_BUFFER_SIZE;
wantedSpec.userdata = is;
wantedSpec.callback = AudioCallback;
if (SDL_OpenAudio(&wantedSpec, &audioSpec) < 0) {
fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
return -1;
}
PacketQueueInit(&is->audioq);
SDL_PauseAudio(0);
}
else if (codecPar->codec_type == AVMEDIA_TYPE_VIDEO)
{
is->videoCtx = codecCtx;
is->videoStream = streamIndex;
is->videoSt = pFormatCtx->streams[streamIndex];
is->frameTimer = (double)av_gettime() / 1000000.0;
is->lastFrameDelay = 40e-3;
is->pSwsCtx = sws_getContext(codecCtx->width,
codecCtx->height,
codecCtx->pix_fmt,
codecCtx->width,
codecCtx->height,
AV_PIX_FMT_RGB24,
SWS_BILINEAR,
NULL,
NULL,
NULL);
if(!is->pSwsCtx) return -1;
is->pFrameRGB = av_frame_alloc();
if (!is->pFrameRGB) return -1;
rgbFrameSize = av_image_get_buffer_size(AV_PIX_FMT_RGB24, codecPar->width, codecPar->height, 8);
if (rgbFrameSize < 1) return -1;
is->pFrameBuffer = (uint8_t*)av_malloc(rgbFrameSize);
if (!is->pFrameBuffer) return AVERROR(ENOMEM);
rv = av_image_fill_arrays(&is->pFrameRGB->data[0],
&is->pFrameRGB->linesize[0],
is->pFrameBuffer,
AV_PIX_FMT_RGB24,
codecPar->width,
codecPar->height,
1);
if (rv < 0) return rv;
PacketQueueInit(&is->videoq);
is->hVideoThread = (HANDLE)_beginthreadex(NULL, 0, VideoThread, is, 0, NULL);
if (!is->hVideoThread) return -1;
}
else
{
avcodec_free_context(&codecCtx);
return -1;
}
return 0;
}
unsigned __stdcall DecodeThread(void* pUserData)
{
VideoState * is = (VideoState*)pUserData;
AVPacket pkt;
int rv;
for (;;)
{
if (is->quit) break;
if (is->videoq.size >= MAX_QUEUE_SIZE || is->audioq.size >= MAX_QUEUE_SIZE)
{
Sleep(10);
continue;
}
rv = av_read_frame(is->pFormatCtx, &pkt);
if (rv < 0) break;
Sleep(10); // need more locking, actually
if (pkt.stream_index == is->audioStream)
{
PacketQueuePut(&is->audioq, &pkt);
}
else if (pkt.stream_index == is->videoStream)
{
PacketQueuePut(&is->videoq, &pkt);
}
av_packet_unref(&pkt);
}
while (!is->quit)
{
Sleep(100);
}
if (1)
{
SDL_Event evt;
evt.type = FF_QUIT_EVENT;
evt.user.data1 = is;
SDL_PushEvent(&evt);
}
return 0;
}
Uint32 TimerRefreshCallback(Uint32 interval, void* param)
{
SDL_Event evt;
evt.type = FF_REFRESH_EVENT;
evt.user.data1 = param;
SDL_PushEvent(&evt);
return 0;
}
void ScheduleRefresh(VideoState* is, int delay)
{
SDL_AddTimer(delay, TimerRefreshCallback, is);
}
void DisplayVideo(VideoState* is)
{
VideoPicture * vp;
SDL_Rect rect;
double aspectRatio;
int w, h, x, y, windowW, windowH;
vp = &is->pictq[is->pictqRindex];
if (vp->texture)
{
if (is->videoCtx->sample_aspect_ratio.num == 0)
{
aspectRatio = 0;
}
else
{
aspectRatio = av_q2d(is->videoCtx->sample_aspect_ratio) *
is->videoCtx->width /
is->videoCtx->height;
}
if (aspectRatio <= 0.0)
{
aspectRatio = is->videoCtx->width / (double)is->videoCtx->height;
}
SDL_GetWindowSize(is->window, &windowW, &windowH);
h = windowH;
w = ((int)rint(h * aspectRatio)) & -3;
if (w > windowW) {
w = windowW;
h = ((int)rint(w / aspectRatio)) & -3;
}
x = (windowW - w) / 2;
y = (windowH - h) / 2;
rect.x = x;
rect.y = y;
rect.w = w;
rect.h = h;
SDL_RenderClear(is->renderer);
SDL_RenderCopy(is->renderer, vp->texture, NULL, &rect);
SDL_RenderPresent(is->renderer);
}
}
double GetAudioClock(VideoState * is)
{
double pts;
int hwBufSize, bytesPerSec, n;
pts = is->audioClock;
hwBufSize = is->audioBufSize - is->audioBufIndex;
bytesPerSec = 0;
if (is->audioCtx)
{
n = is->audioCtx->channels * sizeof(float);
bytesPerSec = is->audioCtx->sample_rate * n;
}
if (bytesPerSec)
{
pts -= hwBufSize / bytesPerSec;
}
return pts;
}
void VideoRefreshTimer(void* userData)
{
VideoState * is = (VideoState*)userData;
VideoPicture * vp;
double delay, actualDelay, syncThreshold, refClock, diff;
if (is->videoCtx)
{
if (is->pictqSize == 0)
{
ScheduleRefresh(is, 10);
}
else
{
vp = &is->pictq[is->pictqRindex];
// timing
delay = vp->pts - is->lastFramePts;
if (delay <= 0 || delay >= 1)
{
delay = is->lastFramePts;
}
// save
is->lastFrameDelay = delay;
is->lastFramePts = vp->pts;
//
refClock = GetAudioClock(is);
diff = vp->pts - refClock;
/* Skip or repeat the frame. Take delay into account
FFPlay still doesn't "know if this is the best guess." */
syncThreshold = (delay > AV_SYNC_THRESHOLD) ? delay : AV_SYNC_THRESHOLD;
if (fabs(diff) < AV_NOSYNC_THRESHOLD)
{
if (diff <= -syncThreshold)
{
delay = 0;
}
else if (diff >= syncThreshold)
{
delay = 2 * delay;
}
}
is->frameTimer += delay;
/* computer the REAL delay */
actualDelay = is->frameTimer - (av_gettime() / 1000000.0);
if (actualDelay < 0.010) {
/* Really it should skip the picture instead */
actualDelay = 0.010;
}
ScheduleRefresh(is, (int)(actualDelay * 1000 + 0.5));
DisplayVideo(is);
if (++is->pictqRindex == VIDEO_PICTURE_QUEUE_SIZE) {
is->pictqRindex = 0;
}
EnterCriticalSection(&is->pictqCs);
is->pictqSize--;
WakeConditionVariable(&is->pictqCv);
LeaveCriticalSection(&is->pictqCs);
}
}
else
{
ScheduleRefresh(is, 100);
}
}
int DecodeInterruptCallback(void* userData)
{
VideoState * is = (VideoState*)userData;
return is && is->quit;
}
int main(int argc, char** argv)
{
int rv = 0, audioStream = -1, videoStream = -1;
unsigned int s = 0;
char* filename = NULL;
SDL_Event evt;
VideoState * is = NULL;
SDL_Window * window = NULL;
SDL_Renderer * renderer = NULL;
if (argc == 2)
{
filename = argv[1];
}
else if(argc == 1)
{
fprintf(stderr, "Usage: %s <url>", argv[0]);
return 1;
}
else
{
return 1;
}
av_register_all();
avcodec_register_all();
avdevice_register_all();
avformat_network_init();
if (SDL_Init(SDL_INIT_AUDIO | SDL_INIT_VIDEO | SDL_INIT_TIMER))
{
fprintf(stderr, "Unable to init SDL: %s \n", SDL_GetError());
goto cleanup;
}
is = (VideoState*)av_mallocz(sizeof(VideoState));
if (!is) goto cleanup;
global_video_state = is;
av_strlcpy(&is->filename[0], filename, sizeof(is->filename));
is->audioStream = -1;
is->videoStream = -1;
is->pFormatCtx = avformat_alloc_context();
if (!is->pFormatCtx) goto cleanup;
is->pFormatCtx->interrupt_callback.callback = DecodeInterruptCallback;
is->pFormatCtx->interrupt_callback.opaque = is;
rv = avformat_open_input(&is->pFormatCtx, &is->filename[0], NULL, NULL);
if (rv < 0) goto cleanup;
rv = avformat_find_stream_info(is->pFormatCtx, NULL);
if (rv < 0) goto cleanup;
av_dump_format(is->pFormatCtx, 0, &is->filename[0], 0);
for (s = 0; s < is->pFormatCtx->nb_streams; ++s)
{
if (is->pFormatCtx->streams[s]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && audioStream < 0)
{
audioStream = s;
}
else if (is->pFormatCtx->streams[s]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && videoStream < 0)
{
videoStream = s;
}
}
if (audioStream < 0 && videoStream < 0)
{
rv = -1;
goto cleanup;
}
is->audioStream = audioStream;
is->videoStream = videoStream;
if (audioStream >= 0)
{
rv = StreamComponentOpen(is, audioStream);
if (rv < 0) goto cleanup;
}
if (videoStream >= 0)
{
InitializeCriticalSection(&is->pictqCs);
InitializeConditionVariable(&is->pictqCv);
rv = StreamComponentOpen(is, videoStream);
if (rv < 0) goto cleanup;
}
window = SDL_CreateWindow(filename,
SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
videoStream >=0 ? is->videoCtx->width : 640,
videoStream >= 0 ? is->videoCtx->height : 480,
0);
if (!window) goto cleanup;
is->window = window;
renderer = SDL_CreateRenderer(window, -1, 0);
if (!renderer) goto cleanup;
is->renderer = renderer;
fprintf(stderr, "STARTING PARSE THREAD\n");
is->hParseThread = (HANDLE*)_beginthreadex(NULL, 0, DecodeThread, is, 0, NULL);
if (!is->hParseThread) goto cleanup;
ScheduleRefresh(is, 40);
fprintf(stderr, "STARTING SDL LOOP\n");
for (;;)
{
SDL_WaitEvent(&evt);
switch (evt.type)
{
case FF_QUIT_EVENT:
case SDL_QUIT:
is->quit = 1;
WakeConditionVariable(&is->audioq.cv);
WakeConditionVariable(&is->videoq.cv);
WakeConditionVariable(&is->pictqCv);
SDL_Quit();
goto cleanup;
case FF_ALLOC_EVENT:
AllocPicture(evt.user.data1);
break;
case FF_REFRESH_EVENT:
VideoRefreshTimer(evt.user.data1);
break;
default:
break;
}
}
cleanup:
fprintf(stderr, "END SDL LOOP\n");
if (is->hVideoThread)
{
WaitForSingleObject(is->hVideoThread, INFINITE);
}
if (is->hParseThread)
{
WaitForSingleObject(is->hParseThread, INFINITE);
}
if (is->pAudioFrame)
{
av_frame_free(&is->pAudioFrame);
}
if (is->pFrameRGB)
{
av_frame_free(&is->pFrameRGB);
}
if (is->pFrameBuffer)
{
av_free(is->pFrameBuffer);
}
if (is->videoCtx)
{
avcodec_free_context(&is->videoCtx);
}
if (is->audioCtx)
{
avcodec_free_context(&is->audioCtx);
}
if (is->pSwrCtx)
{
swr_free(&is->pSwrCtx);
}
if (is->pSwsCtx)
{
sws_freeContext(is->pSwsCtx);
}
if (is->pFormatCtx)
{
avformat_close_input(&is->pFormatCtx);
}
if (is) av_free(is);
avformat_network_deinit();
return rv;
}
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