ffmpegturtor06.c做了修改，使用sdl2.0
2016-06-06 15:28
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// tutorial05.c
// A pedagogical video player that really works!
//
// Code based on FFplay, Copyright (c) 2003 Fabrice Bellard,
// and a tutorial by Martin Bohme (boehme@inb.uni-luebeckREMOVETHIS.de)
// Tested on Gentoo, CVS version 5/01/07 compiled with GCC 4.1.1
// With updates from https://github.com/chelyaev/ffmpeg-tutorial
// Updates tested on:
// LAVC 54.59.100, LAVF 54.29.104, LSWS 2.1.101, SDL 1.2.15
// on GCC 4.7.2 in Debian February 2015
// Use
//
// gcc -o tutorial05 tutorial05.c -lavformat -lavcodec -lswscale -lz -lm `sdl-config --cflags --libs`
// to build (assuming libavformat and libavcodec are correctly installed,
// and assuming you have sdl-config. Please refer to SDL docs for your installation.)
//
// Run using
// tutorial04 myvideofile.mpg
//
// to play the video stream on your screen.
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
//#include <libswscale/swscale.h>
#include <libswresample/swresample.h>
#include <SDL.h>
#include <SDL_thread.h>
#ifdef __MINGW32__
#undef main /* Prevents SDL from overriding main() */
#endif
#include <stdio.h>
#include <assert.h>
#include <math.h>
// compatibility with newer API
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55,28,1)
#define av_frame_alloc avcodec_alloc_frame
#define av_frame_free avcodec_free_frame
#endif
#define SDL_AUDIO_BUFFER_SIZE 1024
#define MAX_AUDIO_FRAME_SIZE 192000
#define MAX_AUDIOQ_SIZE (5 *
16 * 1024)
#define MAX_VIDEOQ_SIZE (5 *
256 * 1024)
#define AV_SYNC_THRESHOLD 0.01
#define AV_NOSYNC_THRESHOLD 10.0
#define SAMPLE_CORRECTION_PERCENT_MAX 10
#define AUDIO_DIFF_AVG_NB 20
#define FF_REFRESH_EVENT (SDL_USEREVENT)
#define FF_QUIT_EVENT (SDL_USEREVENT + 1)
#define VIDEO_PICTURE_QUEUE_SIZE 1
#define DEFAULT_AV_SYNC_TYPE AV_SYNC_VIDEO_MASTER
struct SwrContext *au_convert_ctx;
typedef struct PacketQueue {
AVPacketList *first_pkt, *last_pkt;
int nb_packets;
int size;
SDL_mutex *mutex;
SDL_cond *cond;
} PacketQueue;
typedef struct VideoPicture {
SDL_Texture *bmp;
int width, height;
/* source height & width */
int allocated;
double pts;
} VideoPicture;
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 8192
typedef struct VideoState {
AVFormatContext *pFormatCtx;
int videoStream, audioStream;
int av_sync_type;
double external_clock;
/* external clock base */
int64_t external_clock_time;
double audio_clock;
AVStream *audio_st;
AVCodecContext *audio_ctx;
PacketQueue audioq;
uint8_t audio_buf[(AVCODEC_MAX_AUDIO_FRAME_SIZE *
3) / 2];
unsigned
int audio_buf_size;
unsigned
int audio_buf_index;
AVFrame audio_frame;
AVPacket audio_pkt;
uint8_t *audio_pkt_data;
int audio_pkt_size;
int audio_hw_buf_size;
double audio_diff_cum;
/* used for AV difference average computation */
double audio_diff_avg_coef;
double audio_diff_threshold;
int audio_diff_avg_count;
double frame_timer;
double frame_last_pts;
double frame_last_delay;
double video_clock;
///<pts of last decoded frame / predicted pts of next decoded frame
double video_current_pts;
///<current displayed pts (different from video_clock if frame fifos are used)
int64_t video_current_pts_time; ///<time (av_gettime) at which we updated video_current_pts - used to have running video pts
AVStream *video_st;
AVCodecContext *video_ctx;
PacketQueue videoq;
struct SwsContext *sws_ctx;
VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
int pictq_size, pictq_rindex, pictq_windex;
SDL_mutex *pictq_mutex;
SDL_cond *pictq_cond;
SDL_Thread *parse_tid;
SDL_Thread *video_tid;
char filename[1024];
int quit;
} VideoState;
enum {
AV_SYNC_AUDIO_MASTER,
AV_SYNC_VIDEO_MASTER,
AV_SYNC_EXTERNAL_MASTER,
};
//SDL_Surface *screen;
SDL_Window *screen;
SDL_Renderer* sdlRenderer;
SDL_Texture* sdlTexture;
SDL_mutex *screen_mutex;
int screen_w = 1920/2;
int screen_h = 1080/2;
SDL_Rect sdlRect;
/* Since we only have one decoding thread, the Big Struct
can be global in case we need it. */
VideoState *global_video_state;
void packet_queue_init(PacketQueue *q) {
memset(q, 0,
sizeof(PacketQueue));
q->mutex = SDL_CreateMutex();
q->cond = SDL_CreateCond();
}
int packet_queue_put(PacketQueue *q, AVPacket *pkt) {
AVPacketList *pkt1;
if(av_dup_packet(pkt) <
0) {
return -1;
}
// if(q->nb_packets>=5) return -1;
pkt1 = av_malloc(sizeof(AVPacketList));
if (!pkt1)
return -1;
pkt1->pkt = *pkt;
pkt1->next = NULL;
SDL_LockMutex(q->mutex);
if (!q->last_pkt)
q->first_pkt = pkt1;
else
q->last_pkt->next = pkt1;
q->last_pkt = pkt1;
q->nb_packets++;
q->size += pkt1->pkt.size;
SDL_CondSignal(q->cond);
SDL_UnlockMutex(q->mutex);
// printf(" PUT q->nb_packets=%d\n", q->nb_packets);
return
0;
}
static int packet_queue_get(PacketQueue *q, AVPacket *pkt,
int block)
{
AVPacketList *pkt1;
int ret;
SDL_LockMutex(q->mutex);
for(;;) {
if(global_video_state->quit) {
ret = -1;
break;
}
pkt1 = q->first_pkt;
if (pkt1) {
q->first_pkt = pkt1->next;
if (!q->first_pkt)
q->last_pkt = NULL;
q->nb_packets--;
q->size -= pkt1->pkt.size;
*pkt = pkt1->pkt;
av_free(pkt1);
ret = 1;
break;
} else
if (!block) {
ret = 0;
break;
} else {
SDL_CondWait(q->cond, q->mutex);
}
}
SDL_UnlockMutex(q->mutex);
// printf("GETa q->nb_packets=%d\n", q->nb_packets);
return ret;
}
double get_audio_clock(VideoState *is) {
double pts;
int hw_buf_size, bytes_per_sec, n;
pts = is->audio_clock; /* maintained in the audio thread */
hw_buf_size = is->audio_buf_size - is->audio_buf_index;
bytes_per_sec = 0;
n = is->audio_ctx->channels * 2;
if(is->audio_st) {
bytes_per_sec = is->audio_ctx->sample_rate * n;
}
if(bytes_per_sec) {
pts -= (double)hw_buf_size / bytes_per_sec;
}
return pts;
}
double get_video_clock(VideoState *is) {
double delta;
delta = (av_gettime() - is->video_current_pts_time) / 1000000.0;
return is->video_current_pts + delta;
}
double get_external_clock(VideoState *is) {
return av_gettime() /
1000000.0;
}
double get_master_clock(VideoState *is) {
if(is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
return get_video_clock(is);
} else
if(is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
return get_audio_clock(is);
} else {
return get_external_clock(is);
}
}
/* Add or subtract samples to get a better sync, return new
audio buffer size */
int synchronize_audio(VideoState *is,
short *samples,
int samples_size,
double pts) {
int n;
double ref_clock;
n = 2 * is->audio_ctx->channels;
if(is->av_sync_type != AV_SYNC_AUDIO_MASTER) {
double diff, avg_diff;
int wanted_size, min_size, max_size
/*, nb_samples */;
ref_clock = get_master_clock(is);
diff = get_audio_clock(is) - ref_clock;
if(diff < AV_NOSYNC_THRESHOLD) {
// accumulate the diffs
is->audio_diff_cum = diff + is->audio_diff_avg_coef
* is->audio_diff_cum;
if(is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
is->audio_diff_avg_count++;
} else {
avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
if(fabs(avg_diff) >= is->audio_diff_threshold) {
wanted_size = samples_size + ((int)(diff * is->audio_ctx->sample_rate) * n);
min_size = samples_size * ((100 - SAMPLE_CORRECTION_PERCENT_MAX) /
100);
max_size = samples_size * ((100 + SAMPLE_CORRECTION_PERCENT_MAX) /
100);
if(wanted_size < min_size) {
wanted_size = min_size;
} else
if (wanted_size > max_size) {
wanted_size = max_size;
}
if(wanted_size < samples_size) {
/* remove samples */
samples_size = wanted_size;
} else
if(wanted_size > samples_size) {
uint8_t *samples_end, *q;
int nb;
/* add samples by copying final sample*/
nb = (samples_size - wanted_size);
samples_end = (uint8_t *)samples + samples_size - n;
q = samples_end + n;
while(nb >
0) {
memcpy(q, samples_end, n);
q += n;
nb -= n;
}
samples_size = wanted_size;
}
}
}
} else {
/* difference is TOO big; reset diff stuff */
is->audio_diff_avg_count = 0;
is->audio_diff_cum = 0;
}
}
return samples_size;
}
void convertFmt(AVFrame *audioFrame,short *outputBuffer,int fmt){
// Convert from AV_SAMPLE_FMT_FLTP to AV_SAMPLE_FMT_S16
int in_samples = audioFrame->nb_samples;
int in_linesize = audioFrame->linesize[0];
int i=0;
if(fmt == AV_SAMPLE_FMT_S16P){
// Mono
if (audioFrame->channels==1) {
short* inputChannel0 = (short*)audioFrame->extended_data[0];
for (i=0 ; i<in_samples ; i++) {
outputBuffer[i] = (int16_t) ((*inputChannel0++) );
}
}
// Stereo
else {
short* inputChannel0 = (short*)audioFrame->extended_data[0];
short* inputChannel1 = (short*)audioFrame->extended_data[1];
for (i=0 ; i<in_samples ; i++) {
outputBuffer[i*2] = (int16_t) ((*inputChannel0++) );
outputBuffer[i*2+1] = (int16_t) ((*inputChannel1++) );
}
}
}else
if(fmt == AV_SAMPLE_FMT_FLTP){
if (audioFrame->channels==1) {
float* inputChannel0 = (float*)audioFrame->extended_data[0];
for (i=0 ; i<in_samples ; i++) {
outputBuffer[i] = (int16_t) ((*inputChannel0++) *
32767.0f);
}
}else{
float* inputChannel0 = (float*)audioFrame->extended_data[0];
float* inputChannel1 = (float*)audioFrame->extended_data[1];
for (i=0 ; i<in_samples ; i++) {
outputBuffer[i*2] = (int16_t) ((*inputChannel0++) *
32767.0f);
outputBuffer[i*2+1] = (int16_t) ((*inputChannel1++) *
32767.0f);
}
}
}
// outputBuffer now contains 16-bit PCM!
}
int audio_decode_frame(VideoState *is, uint8_t *audio_buf,
int buf_size, double *pts_ptr) {
int len1, data_size =
0;
AVPacket *pkt = &is->audio_pkt;
double pts;
int n;
int out_buffer_size;
for(;;) {
while(is->audio_pkt_size >
0) {
int got_frame =
0;
len1 = avcodec_decode_audio4(is->audio_ctx, &is->audio_frame, &got_frame, pkt);
if(len1 <
0) {
/* if error, skip frame */
is->audio_pkt_size = 0;
break;
}
data_size = 0;
if(got_frame) {
data_size = av_samples_get_buffer_size(NULL,
is->audio_ctx->channels,
is->audio_frame.nb_samples,
is->audio_ctx->sample_fmt,
1);
// printf("data_size=%d,is->audio_ctx->sample_fmt=%d\n",data_size,is->audio_ctx->sample_fmt);
assert(data_size <= buf_size);
out_buffer_size = is->audio_frame.nb_samples*is->audio_ctx->channels*2;
char *out_buffer=malloc(out_buffer_size);
// convertFmt(&is->audio_frame,out_buffer,is->audio_ctx->sample_fmt);//s16p to s16
int tmp = swr_convert(au_convert_ctx,&out_buffer, is->audio_frame.nb_samples,(const uint8_t **)is->audio_frame.extended_data
, is->audio_frame.nb_samples);
memcpy(audio_buf, out_buffer, out_buffer_size);
free(out_buffer);
}
is->audio_pkt_data += len1;
is->audio_pkt_size -= len1;
if(data_size <=
0) {
/* No data yet, get more frames */
continue;
}
pts = is->audio_clock;
*pts_ptr = pts;
n = 2 * is->audio_ctx->channels;
is->audio_clock += (double)data_size /
(double)(n * is->audio_ctx->sample_rate);
/* We have data, return it and come back for more later */
return out_buffer_size;
}
if(pkt->data)
av_free_packet(pkt);
if(is->quit) {
return -1;
}
/* next packet */
if(packet_queue_get(&is->audioq, pkt,
1) < 0) {
return -1;
}
is->audio_pkt_data = pkt->data;
is->audio_pkt_size = pkt->size;
/* if update, update the audio clock w/pts */
if(pkt->pts != AV_NOPTS_VALUE) {
is->audio_clock = av_q2d(is->audio_st->time_base)*pkt->pts;
}
}
}
void audio_callback(void *userdata, Uint8 *stream,
int len) {
VideoState *is = (VideoState *)userdata;
int len1, audio_size;
double pts;
while(len >
0) {
if(is->audio_buf_index >= is->audio_buf_size) {
/* We have already sent all our data; get more */
audio_size = audio_decode_frame(is, is->audio_buf, sizeof(is->audio_buf), &pts);
if(audio_size <
0) {
/* If error, output silence */
is->audio_buf_size = 1024;
memset(is->audio_buf,
0, is->audio_buf_size);
} else {
audio_size = synchronize_audio(is, (int16_t *)is->audio_buf,
audio_size, pts);
is->audio_buf_size = audio_size;
}
is->audio_buf_index = 0;
}
len1 = is->audio_buf_size - is->audio_buf_index;
if(len1 > len)
len1 = len;
memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
len -= len1;
stream += len1;
is->audio_buf_index += len1;
}
}
static Uint32 sdl_refresh_timer_cb(Uint32 interval,
void *opaque) {
SDL_Event event;
event.type = FF_REFRESH_EVENT;
event.user.data1 = opaque;
SDL_PushEvent(&event);
return
0; /* 0 means stop timer */
}
/* schedule a video refresh in 'delay' ms */
static void schedule_refresh(VideoState *is,
int delay) {
SDL_AddTimer(delay, sdl_refresh_timer_cb, is);
}
void video_display(VideoState *is) {
SDL_Rect rect;
VideoPicture *vp;
float aspect_ratio;
int w, h, x, y;
int i;
// printf("pictq_rindex=%d\n",is->pictq_rindex);
vp = &is->pictq[is->pictq_rindex];
if(vp->bmp) {
// printf("333\n");
// SDL_LockMutex(screen_mutex);
SDL_RenderClear( sdlRenderer );
SDL_RenderCopy( sdlRenderer, vp->bmp, NULL, &sdlRect);
SDL_RenderPresent( sdlRenderer );
// printf("444\n");
// SDL_UnlockMutex(screen_mutex);
// if(is->video_ctx->sample_aspect_ratio.num == 0) {
// aspect_ratio = 0;
// } else {
// aspect_ratio = av_q2d(is->video_ctx->sample_aspect_ratio) *
// is->video_ctx->width / is->video_ctx->height;
// }
// if(aspect_ratio <= 0.0) {
// aspect_ratio = (float)is->video_ctx->width /
// (float)is->video_ctx->height;
// }
// h = screen->h;
// w = ((int)rint(h * aspect_ratio)) & -3;
// if(w > screen->w) {
// w = screen->w;
// h = ((int)rint(w / aspect_ratio)) & -3;
// }
// x = (screen->w - w) / 2;
// y = (screen->h - h) / 2;
//
// rect.x = x;
// rect.y = y;
// rect.w = w;
// rect.h = h;
// SDL_LockMutex(screen_mutex);
// SDL_DisplayYUVOverlay(vp->bmp, &rect);
// SDL_UnlockMutex(screen_mutex);
}
}
void video_refresh_timer(void *userdata) {
VideoState *is = (VideoState *)userdata;
VideoPicture *vp;
double actual_delay, delay, sync_threshold, ref_clock, diff;
static
int first = 1;
if(is->video_st) {
if(is->pictq_size ==
0) {
schedule_refresh(is, 1);
} else {
vp = &is->pictq[is->pictq_rindex];
is->video_current_pts = vp->pts;
// printf("delta=%d\n",av_gettime()-is->video_current_pts_time);
is->video_current_pts_time = av_gettime();
delay = vp->pts - is->frame_last_pts; /* the pts from last time */
printf("before vp->pts=%f,is->frame_last_pts=%f,delay=%f\n",vp->pts,is->frame_last_pts,delay);
if(delay <=
0 || delay >= 1.0) {
/* if incorrect delay, use previous one */
delay = is->frame_last_delay;
}
/* save for next time */
is->frame_last_delay = delay;
is->frame_last_pts = vp->pts;
if(first){
is->frame_timer= (av_gettime() / 1000000.0);
delay = is->frame_last_delay;
schedule_refresh(is, (int)(delay *
1000 + 0.5));
video_display(is);
first =0;
if(++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE) {
is->pictq_rindex = 0;
}
SDL_LockMutex(is->pictq_mutex);
is->pictq_size--;
SDL_CondSignal(is->pictq_cond);
SDL_UnlockMutex(is->pictq_mutex);
return;
}
/* update delay to sync to audio if not master source */
if(is->av_sync_type != AV_SYNC_VIDEO_MASTER) {
ref_clock = get_master_clock(is);
diff = vp->pts - ref_clock;
/* Skip or repeat the frame. Take delay into account
FFPlay still doesn't "know if this is the best guess." */
sync_threshold = (delay > AV_SYNC_THRESHOLD) ? delay : AV_SYNC_THRESHOLD;
if(fabs(diff) < AV_NOSYNC_THRESHOLD) {
if(diff <= -sync_threshold) {
delay = 0;
} else
if(diff >= sync_threshold) {
delay = 2 * delay;
}
}
}
is->frame_timer += delay;
/* computer the REAL delay */
actual_delay = is->frame_timer - (av_gettime() / 1000000.0);
// printf("is->frame_timer=%f,actual=%f，delay=%f ,av_gettime()=%f\n",is->frame_timer,actual_delay,delay,av_gettime() / 1000000.0);
if(actual_delay <
0.010) {
/* Really it should skip the picture instead */
actual_delay = 0.010;
}
// actual_delay = 0.010;
// printf("====================================delay=%f,actual=%f\n",delay,actual_delay);
schedule_refresh(is, (int)(actual_delay *
1000 + is->frame_last_delay));
/* show the picture! */
video_display(is);
/* update queue for next picture! */
if(++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE) {
is->pictq_rindex = 0;
}
SDL_LockMutex(is->pictq_mutex);
is->pictq_size--;
SDL_CondSignal(is->pictq_cond);
SDL_UnlockMutex(is->pictq_mutex);
}
} else {
schedule_refresh(is, 20);
}
}
void alloc_picture(void *userdata) {
VideoState *is = (VideoState *)userdata;
VideoPicture *vp;
vp = &is->pictq[is->pictq_windex];
if(vp->bmp) {
// we already have one make another, bigger/smaller
// SDL_FreeYUVOverlay(vp->bmp);
}else{
// printf("alloc_picture\n");
vp->bmp = SDL_CreateTexture(sdlRenderer, SDL_PIXELFORMAT_IYUV, SDL_TEXTUREACCESS_STREAMING,1920,1080);
}
// Allocate a place to put our YUV image on that screen
// SDL_LockMutex(screen_mutex);
// vp->bmp = SDL_CreateYUVOverlay(is->video_ctx->width,
// is->video_ctx->height,
// SDL_YV12_OVERLAY,
// screen);
// SDL_UnlockMutex(screen_mutex);
vp->width = is->video_ctx->width;
vp->height = is->video_ctx->height;
vp->allocated = 1;
}
int queue_picture(VideoState *is, AVFrame *pFrame,
double pts) {
VideoPicture *vp;
int dst_pix_fmt;
AVPicture pict;
/* wait until we have space for a new pic */
SDL_LockMutex(is->pictq_mutex);
while(is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE &&
!is->quit) {
SDL_CondWait(is->pictq_cond, is->pictq_mutex);
}
SDL_UnlockMutex(is->pictq_mutex);
if(is->quit)
return -1;
// printf("pictq_windex=%d\n",is->pictq_windex);
// windex is set to 0 initially
vp = &is->pictq[is->pictq_windex];
/* allocate or resize the buffer! */
if(!vp->bmp ||
vp->width != is->video_ctx->width ||
vp->height != is->video_ctx->height) {
SDL_Event event;
vp->allocated = 0;
alloc_picture(is);
if(is->quit) {
return -1;
}
}
/* We have a place to put our picture on the queue */
if(vp->bmp) {
// printf("111\n");
// SDL_LockMutex(screen_mutex);
SDL_UpdateYUVTexture(vp->bmp,NULL,
pFrame->data[0], pFrame->linesize[0],
pFrame->data[1], pFrame->linesize[1],
pFrame->data[2], pFrame->linesize[2]);
// printf("222\n");
vp->pts = pts;
// SDL_UnlockMutex(screen_mutex);
// printf("queue pts=%f\n",pts);
// SDL_LockYUVOverlay(vp->bmp);
// vp->pts = pts;
//
// dst_pix_fmt = PIX_FMT_YUV420P;
// /* point pict at the queue */
//
// pict.data[0] = vp->bmp->pixels[0];
// pict.data[1] = vp->bmp->pixels[2];
// pict.data[2] = vp->bmp->pixels[1];
//
// pict.linesize[0] = vp->bmp->pitches[0];
// pict.linesize[1] = vp->bmp->pitches[2];
// pict.linesize[2] = vp->bmp->pitches[1];
//
// // Convert the image into YUV format that SDL uses
// sws_scale(is->sws_ctx, (uint8_t const * const *)pFrame->data,
// pFrame->linesize, 0, is->video_ctx->height,
// pict.data, pict.linesize);
//
// SDL_UnlockYUVOverlay(vp->bmp);
// /* now we inform our display thread that we have a pic ready */
if(++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE) {
is->pictq_windex = 0;
}
SDL_LockMutex(is->pictq_mutex);
is->pictq_size++;
SDL_UnlockMutex(is->pictq_mutex);
}
return
0;
}
double synchronize_video(VideoState *is, AVFrame *src_frame,
double pts) {
double frame_delay;
if(pts !=
0) {
/* if we have pts, set video clock to it */
is->video_clock = pts;
} else {
/* if we aren't given a pts, set it to the clock */
pts = is->video_clock;
}
/* update the video clock */
frame_delay = av_q2d(is->video_ctx->time_base);
/* if we are repeating a frame, adjust clock accordingly */
frame_delay += src_frame->repeat_pict * (frame_delay * 0.5);
is->video_clock += frame_delay;
return pts;
}
int video_thread(void *arg) {
VideoState *is = (VideoState *)arg;
AVPacket pkt1, *packet = &pkt1;
int frameFinished;
AVFrame *pFrame;
double pts;
pFrame = av_frame_alloc();
for(;;) {
if(packet_queue_get(&is->videoq, packet,
1) < 0) {
// means we quit getting packets
break;
}
pts = 0;
// Decode video frame
avcodec_decode_video2(is->video_ctx, pFrame, &frameFinished, packet);
// printf("frameFinished=%d\n",frameFinished);
if((pts = av_frame_get_best_effort_timestamp(pFrame)) == AV_NOPTS_VALUE) {
} else {
pts = 0;
// pts = pFrame->pkt_pts;
}
pts = pFrame->pkt_pts;
if(frameFinished){
static
int first = 1;
if(first<=1){
first++;
continue;
}
}
// printf("pts1=%f\n",pts);
// printf("pts=%f,pkt_pts=%d\n",pFrame->pts,pFrame->pkt_pts);
// printf("timebase=%f,is->video_clock=%f\n",av_q2d(is->video_st->time_base),is->video_clock);
pts *= av_q2d(is->video_st->time_base);
// Did we get a video frame?
if(frameFinished) {
pts = synchronize_video(is, pFrame, pts);
// printf("pts2=%f\n",pts);
if(queue_picture(is, pFrame, pts) <
0) {
break;
}
}
av_free_packet(packet);
}
av_frame_free(&pFrame);
return
0;
}
int stream_component_open(VideoState *is,
int stream_index) {
AVFormatContext *pFormatCtx = is->pFormatCtx;
AVCodecContext *codecCtx = NULL;
AVCodec *codec = NULL;
SDL_AudioSpec wanted_spec, spec;
if(stream_index <
0 || stream_index >= pFormatCtx->nb_streams) {
return -1;
}
codec = avcodec_find_decoder(pFormatCtx->streams[stream_index]->codec->codec_id);
if(!codec) {
fprintf(stderr, "Unsupported codec!\n");
return -1;
}
codecCtx = avcodec_alloc_context3(codec);
if(avcodec_copy_context(codecCtx, pFormatCtx->streams[stream_index]->codec) !=
0) {
fprintf(stderr, "Couldn't copy codec context");
return -1;
// Error copying codec context
}
if(codecCtx->codec_type == AVMEDIA_TYPE_AUDIO) {
// Set audio settings from codec info
wanted_spec.freq = codecCtx->sample_rate;
wanted_spec.format = AUDIO_S16SYS;
wanted_spec.channels = codecCtx->channels;
wanted_spec.silence = 0;
wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
wanted_spec.callback = audio_callback;
wanted_spec.userdata = is;
if(SDL_OpenAudio(&wanted_spec, &spec) <
0) {
fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
return -1;
}
is->audio_hw_buf_size = spec.size;
}
if(avcodec_open2(codecCtx, codec,
NULL) < 0) {
fprintf(stderr, "Unsupported codec!\n");
return -1;
}
switch(codecCtx->codec_type) {
case AVMEDIA_TYPE_AUDIO:
is->audioStream = stream_index;
is->audio_st = pFormatCtx->streams[stream_index];
is->audio_ctx = codecCtx;
is->audio_buf_size = 0;
is->audio_buf_index = 0;
memset(&is->audio_pkt, 0,
sizeof(is->audio_pkt));
packet_queue_init(&is->audioq);
au_convert_ctx=swr_alloc_set_opts(0,codecCtx->channel_layout, AV_SAMPLE_FMT_S16, codecCtx->sample_rate,codecCtx->channel_layout,codecCtx->sample_fmt , codecCtx->sample_rate,0,
NULL);
if(au_convert_ctx==NULL){
perror("alloc swr");
}else
swr_init(au_convert_ctx);
SDL_PauseAudio(0);
break;
case AVMEDIA_TYPE_VIDEO:
is->videoStream = stream_index;
is->video_st = pFormatCtx->streams[stream_index];
is->video_ctx = codecCtx;
is->frame_timer = (double)av_gettime() /
1000000.0;
is->frame_last_delay = 40e-3;
is->video_current_pts_time = av_gettime();
packet_queue_init(&is->videoq);
is->video_tid = SDL_CreateThread(video_thread, "video_thread",is);
// is->sws_ctx = sws_getContext(is->video_ctx->width, is->video_ctx->height,
// is->video_ctx->pix_fmt, is->video_ctx->width,
// is->video_ctx->height, PIX_FMT_YUV420P,
// SWS_BILINEAR, NULL, NULL, NULL
// );
break;
default:
break;
}
}
int decode_thread(void *arg) {
VideoState *is = (VideoState *)arg;
AVFormatContext *pFormatCtx;
AVPacket pkt1, *packet = &pkt1;
int video_index = -1;
int audio_index = -1;
int i;
is->videoStream=-1;
is->audioStream=-1;
global_video_state = is;
pFormatCtx = avformat_alloc_context();
AVDictionary* options = NULL;
av_dict_set(&options, "rtsp_transport",
"udp", 0);
// Open video file
if(avformat_open_input(&pFormatCtx, is->filename,
NULL, &options)!=0)
return -1;
// Couldn't open file
is->pFormatCtx = pFormatCtx;
// pFormatCtx->flags |= AVFMT_FLAG_GENPTS;
// Retrieve stream information
if(avformat_find_stream_info(pFormatCtx,
NULL)<0)
return -1;
// Couldn't find stream information
// Dump information about file onto standard error
av_dump_format(pFormatCtx, 0, is->filename,
0);
// Find the first video stream
for(i=0; i<pFormatCtx->nb_streams; i++) {
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO &&
video_index < 0) {
video_index=i;
}
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO &&
audio_index < 0) {
audio_index=i;
}
}
if(audio_index >=
0) {
stream_component_open(is, audio_index);
}
if(video_index >=
0) {
stream_component_open(is, video_index);
}
if(is->videoStream <
0 || is->audioStream <
0) {
fprintf(stderr, "%s: could not open codecs\n", is->filename);
goto fail;
}
// main decode loop
for(;;) {
if(is->quit) {
break;
}
// seek stuff goes here
if(is->audioq.size > MAX_AUDIOQ_SIZE ||
is->videoq.size > MAX_VIDEOQ_SIZE) {
SDL_Delay(10);
continue;
}
// static int time1=0;
// if( av_gettime()-time1>40000){
// printf(">>>>>>>>>>>>>>>>>>>>>>>>>>=%d\n",av_gettime()-time1);
// }
//
// time1=av_gettime();
if(av_read_frame(is->pFormatCtx, packet) <
0) {
// if(is->pFormatCtx->pb->error == 0) {
// SDL_Delay(100); /* no error; wait for user input */
// continue;
// } else {
break;
// }
}
// static int cnt=10;
// if(cnt<=30){
// cnt++;
// continue;
// }
// Is this a packet from the video stream?
if(packet->stream_index == is->videoStream) {
packet_queue_put(&is->videoq, packet);
} else
if(packet->stream_index == is->audioStream) {
packet_queue_put(&is->audioq, packet);
} else {
av_free_packet(packet);
}
}
/* all done - wait for it */
while(!is->quit) {
SDL_Delay(100);
}
fail:
if(1){
SDL_Event event;
event.type = FF_QUIT_EVENT;
event.user.data1 = is;
SDL_PushEvent(&event);
}
return
0;
}
int main(int argc,
char *argv[]) {
SDL_Event event;
VideoState *is;
is = av_mallocz(sizeof(VideoState));
if(argc <
2) {
fprintf(stderr, "Usage: test <file>\n");
exit(1);
}
// Register all formats and codecs
av_register_all();
avformat_network_init();
if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) {
fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
exit(1);
}
sdlRect.x=0;
sdlRect.y=0;
sdlRect.w=screen_w;
sdlRect.h=screen_h;
// Make a screen to put our video
//#ifndef __DARWIN__
// screen = SDL_SetVideoMode(640, 480, 0, 0);
//#else
// screen = SDL_SetVideoMode(640, 480, 24, 0);
//#endif
screen = SDL_CreateWindow("Tutorial Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
screen_w, screen_h,
SDL_WINDOW_OPENGL);
if(!screen) {
fprintf(stderr, "SDL: could not set video mode - exiting\n");
exit(1);
}
sdlRenderer = SDL_CreateRenderer(screen, -1,
0);
screen_mutex = SDL_CreateMutex();
// av_strlcpy(is->filename, "rtsp://admin:admin@10.61.1.53", sizeof(is->filename));
av_strlcpy(is->filename, "/Users/gangzhang/Downloads/colette.15.02.22.ivy.feeling.playful.mp4",
sizeof(is->filename));
// printf("filename=%s",is->filename);
is->pictq_mutex = SDL_CreateMutex();
is->pictq_cond = SDL_CreateCond();
schedule_refresh(is, 40);
is->av_sync_type = DEFAULT_AV_SYNC_TYPE;
is->parse_tid = SDL_CreateThread(decode_thread,"decode_thread", is);
if(!is->parse_tid) {
av_free(is);
return -1;
}
for(;;) {
SDL_WaitEvent(&event);
switch(event.type) {
case FF_QUIT_EVENT:
case SDL_QUIT:
is->quit = 1;
SDL_Quit();
return
0;
break;
case FF_REFRESH_EVENT:
video_refresh_timer(event.user.data1);
break;
default:
break;
}
}
return
0;
}
// A pedagogical video player that really works!
//
// Code based on FFplay, Copyright (c) 2003 Fabrice Bellard,
// and a tutorial by Martin Bohme (boehme@inb.uni-luebeckREMOVETHIS.de)
// Tested on Gentoo, CVS version 5/01/07 compiled with GCC 4.1.1
// With updates from https://github.com/chelyaev/ffmpeg-tutorial
// Updates tested on:
// LAVC 54.59.100, LAVF 54.29.104, LSWS 2.1.101, SDL 1.2.15
// on GCC 4.7.2 in Debian February 2015
// Use
//
// gcc -o tutorial05 tutorial05.c -lavformat -lavcodec -lswscale -lz -lm `sdl-config --cflags --libs`
// to build (assuming libavformat and libavcodec are correctly installed,
// and assuming you have sdl-config. Please refer to SDL docs for your installation.)
//
// Run using
// tutorial04 myvideofile.mpg
//
// to play the video stream on your screen.
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
//#include <libswscale/swscale.h>
#include <libswresample/swresample.h>
#include <SDL.h>
#include <SDL_thread.h>
#ifdef __MINGW32__
#undef main /* Prevents SDL from overriding main() */
#endif
#include <stdio.h>
#include <assert.h>
#include <math.h>
// compatibility with newer API
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55,28,1)
#define av_frame_alloc avcodec_alloc_frame
#define av_frame_free avcodec_free_frame
#endif
#define SDL_AUDIO_BUFFER_SIZE 1024
#define MAX_AUDIO_FRAME_SIZE 192000
#define MAX_AUDIOQ_SIZE (5 *
16 * 1024)
#define MAX_VIDEOQ_SIZE (5 *
256 * 1024)
#define AV_SYNC_THRESHOLD 0.01
#define AV_NOSYNC_THRESHOLD 10.0
#define SAMPLE_CORRECTION_PERCENT_MAX 10
#define AUDIO_DIFF_AVG_NB 20
#define FF_REFRESH_EVENT (SDL_USEREVENT)
#define FF_QUIT_EVENT (SDL_USEREVENT + 1)
#define VIDEO_PICTURE_QUEUE_SIZE 1
#define DEFAULT_AV_SYNC_TYPE AV_SYNC_VIDEO_MASTER
struct SwrContext *au_convert_ctx;
typedef struct PacketQueue {
AVPacketList *first_pkt, *last_pkt;
int nb_packets;
int size;
SDL_mutex *mutex;
SDL_cond *cond;
} PacketQueue;
typedef struct VideoPicture {
SDL_Texture *bmp;
int width, height;
/* source height & width */
int allocated;
double pts;
} VideoPicture;
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 8192
typedef struct VideoState {
AVFormatContext *pFormatCtx;
int videoStream, audioStream;
int av_sync_type;
double external_clock;
/* external clock base */
int64_t external_clock_time;
double audio_clock;
AVStream *audio_st;
AVCodecContext *audio_ctx;
PacketQueue audioq;
uint8_t audio_buf[(AVCODEC_MAX_AUDIO_FRAME_SIZE *
3) / 2];
unsigned
int audio_buf_size;
unsigned
int audio_buf_index;
AVFrame audio_frame;
AVPacket audio_pkt;
uint8_t *audio_pkt_data;
int audio_pkt_size;
int audio_hw_buf_size;
double audio_diff_cum;
/* used for AV difference average computation */
double audio_diff_avg_coef;
double audio_diff_threshold;
int audio_diff_avg_count;
double frame_timer;
double frame_last_pts;
double frame_last_delay;
double video_clock;
///<pts of last decoded frame / predicted pts of next decoded frame
double video_current_pts;
///<current displayed pts (different from video_clock if frame fifos are used)
int64_t video_current_pts_time; ///<time (av_gettime) at which we updated video_current_pts - used to have running video pts
AVStream *video_st;
AVCodecContext *video_ctx;
PacketQueue videoq;
struct SwsContext *sws_ctx;
VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
int pictq_size, pictq_rindex, pictq_windex;
SDL_mutex *pictq_mutex;
SDL_cond *pictq_cond;
SDL_Thread *parse_tid;
SDL_Thread *video_tid;
char filename[1024];
int quit;
} VideoState;
enum {
AV_SYNC_AUDIO_MASTER,
AV_SYNC_VIDEO_MASTER,
AV_SYNC_EXTERNAL_MASTER,
};
//SDL_Surface *screen;
SDL_Window *screen;
SDL_Renderer* sdlRenderer;
SDL_Texture* sdlTexture;
SDL_mutex *screen_mutex;
int screen_w = 1920/2;
int screen_h = 1080/2;
SDL_Rect sdlRect;
/* Since we only have one decoding thread, the Big Struct
can be global in case we need it. */
VideoState *global_video_state;
void packet_queue_init(PacketQueue *q) {
memset(q, 0,
sizeof(PacketQueue));
q->mutex = SDL_CreateMutex();
q->cond = SDL_CreateCond();
}
int packet_queue_put(PacketQueue *q, AVPacket *pkt) {
AVPacketList *pkt1;
if(av_dup_packet(pkt) <
0) {
return -1;
}
// if(q->nb_packets>=5) return -1;
pkt1 = av_malloc(sizeof(AVPacketList));
if (!pkt1)
return -1;
pkt1->pkt = *pkt;
pkt1->next = NULL;
SDL_LockMutex(q->mutex);
if (!q->last_pkt)
q->first_pkt = pkt1;
else
q->last_pkt->next = pkt1;
q->last_pkt = pkt1;
q->nb_packets++;
q->size += pkt1->pkt.size;
SDL_CondSignal(q->cond);
SDL_UnlockMutex(q->mutex);
// printf(" PUT q->nb_packets=%d\n", q->nb_packets);
return
0;
}
static int packet_queue_get(PacketQueue *q, AVPacket *pkt,
int block)
{
AVPacketList *pkt1;
int ret;
SDL_LockMutex(q->mutex);
for(;;) {
if(global_video_state->quit) {
ret = -1;
break;
}
pkt1 = q->first_pkt;
if (pkt1) {
q->first_pkt = pkt1->next;
if (!q->first_pkt)
q->last_pkt = NULL;
q->nb_packets--;
q->size -= pkt1->pkt.size;
*pkt = pkt1->pkt;
av_free(pkt1);
ret = 1;
break;
} else
if (!block) {
ret = 0;
break;
} else {
SDL_CondWait(q->cond, q->mutex);
}
}
SDL_UnlockMutex(q->mutex);
// printf("GETa q->nb_packets=%d\n", q->nb_packets);
return ret;
}
double get_audio_clock(VideoState *is) {
double pts;
int hw_buf_size, bytes_per_sec, n;
pts = is->audio_clock; /* maintained in the audio thread */
hw_buf_size = is->audio_buf_size - is->audio_buf_index;
bytes_per_sec = 0;
n = is->audio_ctx->channels * 2;
if(is->audio_st) {
bytes_per_sec = is->audio_ctx->sample_rate * n;
}
if(bytes_per_sec) {
pts -= (double)hw_buf_size / bytes_per_sec;
}
return pts;
}
double get_video_clock(VideoState *is) {
double delta;
delta = (av_gettime() - is->video_current_pts_time) / 1000000.0;
return is->video_current_pts + delta;
}
double get_external_clock(VideoState *is) {
return av_gettime() /
1000000.0;
}
double get_master_clock(VideoState *is) {
if(is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
return get_video_clock(is);
} else
if(is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
return get_audio_clock(is);
} else {
return get_external_clock(is);
}
}
/* Add or subtract samples to get a better sync, return new
audio buffer size */
int synchronize_audio(VideoState *is,
short *samples,
int samples_size,
double pts) {
int n;
double ref_clock;
n = 2 * is->audio_ctx->channels;
if(is->av_sync_type != AV_SYNC_AUDIO_MASTER) {
double diff, avg_diff;
int wanted_size, min_size, max_size
/*, nb_samples */;
ref_clock = get_master_clock(is);
diff = get_audio_clock(is) - ref_clock;
if(diff < AV_NOSYNC_THRESHOLD) {
// accumulate the diffs
is->audio_diff_cum = diff + is->audio_diff_avg_coef
* is->audio_diff_cum;
if(is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
is->audio_diff_avg_count++;
} else {
avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
if(fabs(avg_diff) >= is->audio_diff_threshold) {
wanted_size = samples_size + ((int)(diff * is->audio_ctx->sample_rate) * n);
min_size = samples_size * ((100 - SAMPLE_CORRECTION_PERCENT_MAX) /
100);
max_size = samples_size * ((100 + SAMPLE_CORRECTION_PERCENT_MAX) /
100);
if(wanted_size < min_size) {
wanted_size = min_size;
} else
if (wanted_size > max_size) {
wanted_size = max_size;
}
if(wanted_size < samples_size) {
/* remove samples */
samples_size = wanted_size;
} else
if(wanted_size > samples_size) {
uint8_t *samples_end, *q;
int nb;
/* add samples by copying final sample*/
nb = (samples_size - wanted_size);
samples_end = (uint8_t *)samples + samples_size - n;
q = samples_end + n;
while(nb >
0) {
memcpy(q, samples_end, n);
q += n;
nb -= n;
}
samples_size = wanted_size;
}
}
}
} else {
/* difference is TOO big; reset diff stuff */
is->audio_diff_avg_count = 0;
is->audio_diff_cum = 0;
}
}
return samples_size;
}
void convertFmt(AVFrame *audioFrame,short *outputBuffer,int fmt){
// Convert from AV_SAMPLE_FMT_FLTP to AV_SAMPLE_FMT_S16
int in_samples = audioFrame->nb_samples;
int in_linesize = audioFrame->linesize[0];
int i=0;
if(fmt == AV_SAMPLE_FMT_S16P){
// Mono
if (audioFrame->channels==1) {
short* inputChannel0 = (short*)audioFrame->extended_data[0];
for (i=0 ; i<in_samples ; i++) {
outputBuffer[i] = (int16_t) ((*inputChannel0++) );
}
}
// Stereo
else {
short* inputChannel0 = (short*)audioFrame->extended_data[0];
short* inputChannel1 = (short*)audioFrame->extended_data[1];
for (i=0 ; i<in_samples ; i++) {
outputBuffer[i*2] = (int16_t) ((*inputChannel0++) );
outputBuffer[i*2+1] = (int16_t) ((*inputChannel1++) );
}
}
}else
if(fmt == AV_SAMPLE_FMT_FLTP){
if (audioFrame->channels==1) {
float* inputChannel0 = (float*)audioFrame->extended_data[0];
for (i=0 ; i<in_samples ; i++) {
outputBuffer[i] = (int16_t) ((*inputChannel0++) *
32767.0f);
}
}else{
float* inputChannel0 = (float*)audioFrame->extended_data[0];
float* inputChannel1 = (float*)audioFrame->extended_data[1];
for (i=0 ; i<in_samples ; i++) {
outputBuffer[i*2] = (int16_t) ((*inputChannel0++) *
32767.0f);
outputBuffer[i*2+1] = (int16_t) ((*inputChannel1++) *
32767.0f);
}
}
}
// outputBuffer now contains 16-bit PCM!
}
int audio_decode_frame(VideoState *is, uint8_t *audio_buf,
int buf_size, double *pts_ptr) {
int len1, data_size =
0;
AVPacket *pkt = &is->audio_pkt;
double pts;
int n;
int out_buffer_size;
for(;;) {
while(is->audio_pkt_size >
0) {
int got_frame =
0;
len1 = avcodec_decode_audio4(is->audio_ctx, &is->audio_frame, &got_frame, pkt);
if(len1 <
0) {
/* if error, skip frame */
is->audio_pkt_size = 0;
break;
}
data_size = 0;
if(got_frame) {
data_size = av_samples_get_buffer_size(NULL,
is->audio_ctx->channels,
is->audio_frame.nb_samples,
is->audio_ctx->sample_fmt,
1);
// printf("data_size=%d,is->audio_ctx->sample_fmt=%d\n",data_size,is->audio_ctx->sample_fmt);
assert(data_size <= buf_size);
out_buffer_size = is->audio_frame.nb_samples*is->audio_ctx->channels*2;
char *out_buffer=malloc(out_buffer_size);
// convertFmt(&is->audio_frame,out_buffer,is->audio_ctx->sample_fmt);//s16p to s16
int tmp = swr_convert(au_convert_ctx,&out_buffer, is->audio_frame.nb_samples,(const uint8_t **)is->audio_frame.extended_data
, is->audio_frame.nb_samples);
memcpy(audio_buf, out_buffer, out_buffer_size);
free(out_buffer);
}
is->audio_pkt_data += len1;
is->audio_pkt_size -= len1;
if(data_size <=
0) {
/* No data yet, get more frames */
continue;
}
pts = is->audio_clock;
*pts_ptr = pts;
n = 2 * is->audio_ctx->channels;
is->audio_clock += (double)data_size /
(double)(n * is->audio_ctx->sample_rate);
/* We have data, return it and come back for more later */
return out_buffer_size;
}
if(pkt->data)
av_free_packet(pkt);
if(is->quit) {
return -1;
}
/* next packet */
if(packet_queue_get(&is->audioq, pkt,
1) < 0) {
return -1;
}
is->audio_pkt_data = pkt->data;
is->audio_pkt_size = pkt->size;
/* if update, update the audio clock w/pts */
if(pkt->pts != AV_NOPTS_VALUE) {
is->audio_clock = av_q2d(is->audio_st->time_base)*pkt->pts;
}
}
}
void audio_callback(void *userdata, Uint8 *stream,
int len) {
VideoState *is = (VideoState *)userdata;
int len1, audio_size;
double pts;
while(len >
0) {
if(is->audio_buf_index >= is->audio_buf_size) {
/* We have already sent all our data; get more */
audio_size = audio_decode_frame(is, is->audio_buf, sizeof(is->audio_buf), &pts);
if(audio_size <
0) {
/* If error, output silence */
is->audio_buf_size = 1024;
memset(is->audio_buf,
0, is->audio_buf_size);
} else {
audio_size = synchronize_audio(is, (int16_t *)is->audio_buf,
audio_size, pts);
is->audio_buf_size = audio_size;
}
is->audio_buf_index = 0;
}
len1 = is->audio_buf_size - is->audio_buf_index;
if(len1 > len)
len1 = len;
memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
len -= len1;
stream += len1;
is->audio_buf_index += len1;
}
}
static Uint32 sdl_refresh_timer_cb(Uint32 interval,
void *opaque) {
SDL_Event event;
event.type = FF_REFRESH_EVENT;
event.user.data1 = opaque;
SDL_PushEvent(&event);
return
0; /* 0 means stop timer */
}
/* schedule a video refresh in 'delay' ms */
static void schedule_refresh(VideoState *is,
int delay) {
SDL_AddTimer(delay, sdl_refresh_timer_cb, is);
}
void video_display(VideoState *is) {
SDL_Rect rect;
VideoPicture *vp;
float aspect_ratio;
int w, h, x, y;
int i;
// printf("pictq_rindex=%d\n",is->pictq_rindex);
vp = &is->pictq[is->pictq_rindex];
if(vp->bmp) {
// printf("333\n");
// SDL_LockMutex(screen_mutex);
SDL_RenderClear( sdlRenderer );
SDL_RenderCopy( sdlRenderer, vp->bmp, NULL, &sdlRect);
SDL_RenderPresent( sdlRenderer );
// printf("444\n");
// SDL_UnlockMutex(screen_mutex);
// if(is->video_ctx->sample_aspect_ratio.num == 0) {
// aspect_ratio = 0;
// } else {
// aspect_ratio = av_q2d(is->video_ctx->sample_aspect_ratio) *
// is->video_ctx->width / is->video_ctx->height;
// }
// if(aspect_ratio <= 0.0) {
// aspect_ratio = (float)is->video_ctx->width /
// (float)is->video_ctx->height;
// }
// h = screen->h;
// w = ((int)rint(h * aspect_ratio)) & -3;
// if(w > screen->w) {
// w = screen->w;
// h = ((int)rint(w / aspect_ratio)) & -3;
// }
// x = (screen->w - w) / 2;
// y = (screen->h - h) / 2;
//
// rect.x = x;
// rect.y = y;
// rect.w = w;
// rect.h = h;
// SDL_LockMutex(screen_mutex);
// SDL_DisplayYUVOverlay(vp->bmp, &rect);
// SDL_UnlockMutex(screen_mutex);
}
}
void video_refresh_timer(void *userdata) {
VideoState *is = (VideoState *)userdata;
VideoPicture *vp;
double actual_delay, delay, sync_threshold, ref_clock, diff;
static
int first = 1;
if(is->video_st) {
if(is->pictq_size ==
0) {
schedule_refresh(is, 1);
} else {
vp = &is->pictq[is->pictq_rindex];
is->video_current_pts = vp->pts;
// printf("delta=%d\n",av_gettime()-is->video_current_pts_time);
is->video_current_pts_time = av_gettime();
delay = vp->pts - is->frame_last_pts; /* the pts from last time */
printf("before vp->pts=%f,is->frame_last_pts=%f,delay=%f\n",vp->pts,is->frame_last_pts,delay);
if(delay <=
0 || delay >= 1.0) {
/* if incorrect delay, use previous one */
delay = is->frame_last_delay;
}
/* save for next time */
is->frame_last_delay = delay;
is->frame_last_pts = vp->pts;
if(first){
is->frame_timer= (av_gettime() / 1000000.0);
delay = is->frame_last_delay;
schedule_refresh(is, (int)(delay *
1000 + 0.5));
video_display(is);
first =0;
if(++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE) {
is->pictq_rindex = 0;
}
SDL_LockMutex(is->pictq_mutex);
is->pictq_size--;
SDL_CondSignal(is->pictq_cond);
SDL_UnlockMutex(is->pictq_mutex);
return;
}
/* update delay to sync to audio if not master source */
if(is->av_sync_type != AV_SYNC_VIDEO_MASTER) {
ref_clock = get_master_clock(is);
diff = vp->pts - ref_clock;
/* Skip or repeat the frame. Take delay into account
FFPlay still doesn't "know if this is the best guess." */
sync_threshold = (delay > AV_SYNC_THRESHOLD) ? delay : AV_SYNC_THRESHOLD;
if(fabs(diff) < AV_NOSYNC_THRESHOLD) {
if(diff <= -sync_threshold) {
delay = 0;
} else
if(diff >= sync_threshold) {
delay = 2 * delay;
}
}
}
is->frame_timer += delay;
/* computer the REAL delay */
actual_delay = is->frame_timer - (av_gettime() / 1000000.0);
// printf("is->frame_timer=%f,actual=%f，delay=%f ,av_gettime()=%f\n",is->frame_timer,actual_delay,delay,av_gettime() / 1000000.0);
if(actual_delay <
0.010) {
/* Really it should skip the picture instead */
actual_delay = 0.010;
}
// actual_delay = 0.010;
// printf("====================================delay=%f,actual=%f\n",delay,actual_delay);
schedule_refresh(is, (int)(actual_delay *
1000 + is->frame_last_delay));
/* show the picture! */
video_display(is);
/* update queue for next picture! */
if(++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE) {
is->pictq_rindex = 0;
}
SDL_LockMutex(is->pictq_mutex);
is->pictq_size--;
SDL_CondSignal(is->pictq_cond);
SDL_UnlockMutex(is->pictq_mutex);
}
} else {
schedule_refresh(is, 20);
}
}
void alloc_picture(void *userdata) {
VideoState *is = (VideoState *)userdata;
VideoPicture *vp;
vp = &is->pictq[is->pictq_windex];
if(vp->bmp) {
// we already have one make another, bigger/smaller
// SDL_FreeYUVOverlay(vp->bmp);
}else{
// printf("alloc_picture\n");
vp->bmp = SDL_CreateTexture(sdlRenderer, SDL_PIXELFORMAT_IYUV, SDL_TEXTUREACCESS_STREAMING,1920,1080);
}
// Allocate a place to put our YUV image on that screen
// SDL_LockMutex(screen_mutex);
// vp->bmp = SDL_CreateYUVOverlay(is->video_ctx->width,
// is->video_ctx->height,
// SDL_YV12_OVERLAY,
// screen);
// SDL_UnlockMutex(screen_mutex);
vp->width = is->video_ctx->width;
vp->height = is->video_ctx->height;
vp->allocated = 1;
}
int queue_picture(VideoState *is, AVFrame *pFrame,
double pts) {
VideoPicture *vp;
int dst_pix_fmt;
AVPicture pict;
/* wait until we have space for a new pic */
SDL_LockMutex(is->pictq_mutex);
while(is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE &&
!is->quit) {
SDL_CondWait(is->pictq_cond, is->pictq_mutex);
}
SDL_UnlockMutex(is->pictq_mutex);
if(is->quit)
return -1;
// printf("pictq_windex=%d\n",is->pictq_windex);
// windex is set to 0 initially
vp = &is->pictq[is->pictq_windex];
/* allocate or resize the buffer! */
if(!vp->bmp ||
vp->width != is->video_ctx->width ||
vp->height != is->video_ctx->height) {
SDL_Event event;
vp->allocated = 0;
alloc_picture(is);
if(is->quit) {
return -1;
}
}
/* We have a place to put our picture on the queue */
if(vp->bmp) {
// printf("111\n");
// SDL_LockMutex(screen_mutex);
SDL_UpdateYUVTexture(vp->bmp,NULL,
pFrame->data[0], pFrame->linesize[0],
pFrame->data[1], pFrame->linesize[1],
pFrame->data[2], pFrame->linesize[2]);
// printf("222\n");
vp->pts = pts;
// SDL_UnlockMutex(screen_mutex);
// printf("queue pts=%f\n",pts);
// SDL_LockYUVOverlay(vp->bmp);
// vp->pts = pts;
//
// dst_pix_fmt = PIX_FMT_YUV420P;
// /* point pict at the queue */
//
// pict.data[0] = vp->bmp->pixels[0];
// pict.data[1] = vp->bmp->pixels[2];
// pict.data[2] = vp->bmp->pixels[1];
//
// pict.linesize[0] = vp->bmp->pitches[0];
// pict.linesize[1] = vp->bmp->pitches[2];
// pict.linesize[2] = vp->bmp->pitches[1];
//
// // Convert the image into YUV format that SDL uses
// sws_scale(is->sws_ctx, (uint8_t const * const *)pFrame->data,
// pFrame->linesize, 0, is->video_ctx->height,
// pict.data, pict.linesize);
//
// SDL_UnlockYUVOverlay(vp->bmp);
// /* now we inform our display thread that we have a pic ready */
if(++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE) {
is->pictq_windex = 0;
}
SDL_LockMutex(is->pictq_mutex);
is->pictq_size++;
SDL_UnlockMutex(is->pictq_mutex);
}
return
0;
}
double synchronize_video(VideoState *is, AVFrame *src_frame,
double pts) {
double frame_delay;
if(pts !=
0) {
/* if we have pts, set video clock to it */
is->video_clock = pts;
} else {
/* if we aren't given a pts, set it to the clock */
pts = is->video_clock;
}
/* update the video clock */
frame_delay = av_q2d(is->video_ctx->time_base);
/* if we are repeating a frame, adjust clock accordingly */
frame_delay += src_frame->repeat_pict * (frame_delay * 0.5);
is->video_clock += frame_delay;
return pts;
}
int video_thread(void *arg) {
VideoState *is = (VideoState *)arg;
AVPacket pkt1, *packet = &pkt1;
int frameFinished;
AVFrame *pFrame;
double pts;
pFrame = av_frame_alloc();
for(;;) {
if(packet_queue_get(&is->videoq, packet,
1) < 0) {
// means we quit getting packets
break;
}
pts = 0;
// Decode video frame
avcodec_decode_video2(is->video_ctx, pFrame, &frameFinished, packet);
// printf("frameFinished=%d\n",frameFinished);
if((pts = av_frame_get_best_effort_timestamp(pFrame)) == AV_NOPTS_VALUE) {
} else {
pts = 0;
// pts = pFrame->pkt_pts;
}
pts = pFrame->pkt_pts;
if(frameFinished){
static
int first = 1;
if(first<=1){
first++;
continue;
}
}
// printf("pts1=%f\n",pts);
// printf("pts=%f,pkt_pts=%d\n",pFrame->pts,pFrame->pkt_pts);
// printf("timebase=%f,is->video_clock=%f\n",av_q2d(is->video_st->time_base),is->video_clock);
pts *= av_q2d(is->video_st->time_base);
// Did we get a video frame?
if(frameFinished) {
pts = synchronize_video(is, pFrame, pts);
// printf("pts2=%f\n",pts);
if(queue_picture(is, pFrame, pts) <
0) {
break;
}
}
av_free_packet(packet);
}
av_frame_free(&pFrame);
return
0;
}
int stream_component_open(VideoState *is,
int stream_index) {
AVFormatContext *pFormatCtx = is->pFormatCtx;
AVCodecContext *codecCtx = NULL;
AVCodec *codec = NULL;
SDL_AudioSpec wanted_spec, spec;
if(stream_index <
0 || stream_index >= pFormatCtx->nb_streams) {
return -1;
}
codec = avcodec_find_decoder(pFormatCtx->streams[stream_index]->codec->codec_id);
if(!codec) {
fprintf(stderr, "Unsupported codec!\n");
return -1;
}
codecCtx = avcodec_alloc_context3(codec);
if(avcodec_copy_context(codecCtx, pFormatCtx->streams[stream_index]->codec) !=
0) {
fprintf(stderr, "Couldn't copy codec context");
return -1;
// Error copying codec context
}
if(codecCtx->codec_type == AVMEDIA_TYPE_AUDIO) {
// Set audio settings from codec info
wanted_spec.freq = codecCtx->sample_rate;
wanted_spec.format = AUDIO_S16SYS;
wanted_spec.channels = codecCtx->channels;
wanted_spec.silence = 0;
wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
wanted_spec.callback = audio_callback;
wanted_spec.userdata = is;
if(SDL_OpenAudio(&wanted_spec, &spec) <
0) {
fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
return -1;
}
is->audio_hw_buf_size = spec.size;
}
if(avcodec_open2(codecCtx, codec,
NULL) < 0) {
fprintf(stderr, "Unsupported codec!\n");
return -1;
}
switch(codecCtx->codec_type) {
case AVMEDIA_TYPE_AUDIO:
is->audioStream = stream_index;
is->audio_st = pFormatCtx->streams[stream_index];
is->audio_ctx = codecCtx;
is->audio_buf_size = 0;
is->audio_buf_index = 0;
memset(&is->audio_pkt, 0,
sizeof(is->audio_pkt));
packet_queue_init(&is->audioq);
au_convert_ctx=swr_alloc_set_opts(0,codecCtx->channel_layout, AV_SAMPLE_FMT_S16, codecCtx->sample_rate,codecCtx->channel_layout,codecCtx->sample_fmt , codecCtx->sample_rate,0,
NULL);
if(au_convert_ctx==NULL){
perror("alloc swr");
}else
swr_init(au_convert_ctx);
SDL_PauseAudio(0);
break;
case AVMEDIA_TYPE_VIDEO:
is->videoStream = stream_index;
is->video_st = pFormatCtx->streams[stream_index];
is->video_ctx = codecCtx;
is->frame_timer = (double)av_gettime() /
1000000.0;
is->frame_last_delay = 40e-3;
is->video_current_pts_time = av_gettime();
packet_queue_init(&is->videoq);
is->video_tid = SDL_CreateThread(video_thread, "video_thread",is);
// is->sws_ctx = sws_getContext(is->video_ctx->width, is->video_ctx->height,
// is->video_ctx->pix_fmt, is->video_ctx->width,
// is->video_ctx->height, PIX_FMT_YUV420P,
// SWS_BILINEAR, NULL, NULL, NULL
// );
break;
default:
break;
}
}
int decode_thread(void *arg) {
VideoState *is = (VideoState *)arg;
AVFormatContext *pFormatCtx;
AVPacket pkt1, *packet = &pkt1;
int video_index = -1;
int audio_index = -1;
int i;
is->videoStream=-1;
is->audioStream=-1;
global_video_state = is;
pFormatCtx = avformat_alloc_context();
AVDictionary* options = NULL;
av_dict_set(&options, "rtsp_transport",
"udp", 0);
// Open video file
if(avformat_open_input(&pFormatCtx, is->filename,
NULL, &options)!=0)
return -1;
// Couldn't open file
is->pFormatCtx = pFormatCtx;
// pFormatCtx->flags |= AVFMT_FLAG_GENPTS;
// Retrieve stream information
if(avformat_find_stream_info(pFormatCtx,
NULL)<0)
return -1;
// Couldn't find stream information
// Dump information about file onto standard error
av_dump_format(pFormatCtx, 0, is->filename,
0);
// Find the first video stream
for(i=0; i<pFormatCtx->nb_streams; i++) {
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO &&
video_index < 0) {
video_index=i;
}
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO &&
audio_index < 0) {
audio_index=i;
}
}
if(audio_index >=
0) {
stream_component_open(is, audio_index);
}
if(video_index >=
0) {
stream_component_open(is, video_index);
}
if(is->videoStream <
0 || is->audioStream <
0) {
fprintf(stderr, "%s: could not open codecs\n", is->filename);
goto fail;
}
// main decode loop
for(;;) {
if(is->quit) {
break;
}
// seek stuff goes here
if(is->audioq.size > MAX_AUDIOQ_SIZE ||
is->videoq.size > MAX_VIDEOQ_SIZE) {
SDL_Delay(10);
continue;
}
// static int time1=0;
// if( av_gettime()-time1>40000){
// printf(">>>>>>>>>>>>>>>>>>>>>>>>>>=%d\n",av_gettime()-time1);
// }
//
// time1=av_gettime();
if(av_read_frame(is->pFormatCtx, packet) <
0) {
// if(is->pFormatCtx->pb->error == 0) {
// SDL_Delay(100); /* no error; wait for user input */
// continue;
// } else {
break;
// }
}
// static int cnt=10;
// if(cnt<=30){
// cnt++;
// continue;
// }
// Is this a packet from the video stream?
if(packet->stream_index == is->videoStream) {
packet_queue_put(&is->videoq, packet);
} else
if(packet->stream_index == is->audioStream) {
packet_queue_put(&is->audioq, packet);
} else {
av_free_packet(packet);
}
}
/* all done - wait for it */
while(!is->quit) {
SDL_Delay(100);
}
fail:
if(1){
SDL_Event event;
event.type = FF_QUIT_EVENT;
event.user.data1 = is;
SDL_PushEvent(&event);
}
return
0;
}
int main(int argc,
char *argv[]) {
SDL_Event event;
VideoState *is;
is = av_mallocz(sizeof(VideoState));
if(argc <
2) {
fprintf(stderr, "Usage: test <file>\n");
exit(1);
}
// Register all formats and codecs
av_register_all();
avformat_network_init();
if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) {
fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
exit(1);
}
sdlRect.x=0;
sdlRect.y=0;
sdlRect.w=screen_w;
sdlRect.h=screen_h;
// Make a screen to put our video
//#ifndef __DARWIN__
// screen = SDL_SetVideoMode(640, 480, 0, 0);
//#else
// screen = SDL_SetVideoMode(640, 480, 24, 0);
//#endif
screen = SDL_CreateWindow("Tutorial Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
screen_w, screen_h,
SDL_WINDOW_OPENGL);
if(!screen) {
fprintf(stderr, "SDL: could not set video mode - exiting\n");
exit(1);
}
sdlRenderer = SDL_CreateRenderer(screen, -1,
0);
screen_mutex = SDL_CreateMutex();
// av_strlcpy(is->filename, "rtsp://admin:admin@10.61.1.53", sizeof(is->filename));
av_strlcpy(is->filename, "/Users/gangzhang/Downloads/colette.15.02.22.ivy.feeling.playful.mp4",
sizeof(is->filename));
// printf("filename=%s",is->filename);
is->pictq_mutex = SDL_CreateMutex();
is->pictq_cond = SDL_CreateCond();
schedule_refresh(is, 40);
is->av_sync_type = DEFAULT_AV_SYNC_TYPE;
is->parse_tid = SDL_CreateThread(decode_thread,"decode_thread", is);
if(!is->parse_tid) {
av_free(is);
return -1;
}
for(;;) {
SDL_WaitEvent(&event);
switch(event.type) {
case FF_QUIT_EVENT:
case SDL_QUIT:
is->quit = 1;
SDL_Quit();
return
0;
break;
case FF_REFRESH_EVENT:
video_refresh_timer(event.user.data1);
break;
default:
break;
}
}
return
0;
}
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