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Use the new avcodec_decode_* API.

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Patch by Thilo Borgmann name.surname AT googlemail.com.

Originally committed as revision 18409 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Thilo Borgmann 2009-04-10 11:07:52 +00:00 committed by Stefano Sabatini
parent 655d47c2cb
commit 4f313925ec
1 changed files with 28 additions and 23 deletions
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51
libavcodec/api-example.c
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@ -115,10 +115,13 @@ static void audio_decode_example(const char *outfilename, const char *filename)
{
AVCodec *codec;
AVCodecContext *c= NULL;
int out_size, size, len;
int out_size, len;
FILE *f, *outfile;
uint8_t *outbuf;
uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE], *inbuf_ptr;
uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
AVPacket avpkt;
av_init_packet(&avpkt);
printf("Audio decoding\n");
@ -151,17 +154,16 @@ static void audio_decode_example(const char *outfilename, const char *filename)
}
/* decode until eof */
inbuf_ptr = inbuf;
avpkt.data = inbuf;
for(;;) {
size = fread(inbuf, 1, INBUF_SIZE, f);
if (size == 0)
avpkt.size = fread(inbuf, 1, INBUF_SIZE, f);
if (avpkt.size == 0)
break;
inbuf_ptr = inbuf;
while (size > 0) {
avpkt.data = inbuf;
while (avpkt.size > 0) {
out_size = AVCODEC_MAX_AUDIO_FRAME_SIZE;
len = avcodec_decode_audio2(c, (short *)outbuf, &out_size,
inbuf_ptr, size);
len = avcodec_decode_audio3(c, (short *)outbuf, &out_size, &avpkt);
if (len < 0) {
fprintf(stderr, "Error while decoding\n");
exit(1);
@ -170,8 +172,8 @@ static void audio_decode_example(const char *outfilename, const char *filename)
/* if a frame has been decoded, output it */
fwrite(outbuf, 1, out_size, outfile);
}
size -= len;
inbuf_ptr += len;
avpkt.size -= len;
avpkt.data += len;
}
}
@ -314,11 +316,14 @@ static void video_decode_example(const char *outfilename, const char *filename)
{
AVCodec *codec;
AVCodecContext *c= NULL;
int frame, size, got_picture, len;
int frame, got_picture, len;
FILE *f;
AVFrame *picture;
uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE], *inbuf_ptr;
uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
char buf[1024];
AVPacket avpkt;
av_init_packet(&avpkt);
/* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */
memset(inbuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
@ -358,8 +363,8 @@ static void video_decode_example(const char *outfilename, const char *filename)
frame = 0;
for(;;) {
size = fread(inbuf, 1, INBUF_SIZE, f);
if (size == 0)
avpkt.size = fread(inbuf, 1, INBUF_SIZE, f);
if (avpkt.size == 0)
break;
/* NOTE1: some codecs are stream based (mpegvideo, mpegaudio)
@ -377,10 +382,9 @@ static void video_decode_example(const char *outfilename, const char *filename)
/* here, we use a stream based decoder (mpeg1video), so we
feed decoder and see if it could decode a frame */
inbuf_ptr = inbuf;
while (size > 0) {
len = avcodec_decode_video(c, picture, &got_picture,
inbuf_ptr, size);
avpkt.data = inbuf;
while (avpkt.size > 0) {
len = avcodec_decode_video2(c, picture, &got_picture, &avpkt);
if (len < 0) {
fprintf(stderr, "Error while decoding frame %d\n", frame);
exit(1);
@ -396,16 +400,17 @@ static void video_decode_example(const char *outfilename, const char *filename)
c->width, c->height, buf);
frame++;
}
size -= len;
inbuf_ptr += len;
avpkt.size -= len;
avpkt.data += len;
}
}
/* some codecs, such as MPEG, transmit the I and P frame with a
latency of one frame. You must do the following to have a
chance to get the last frame of the video */
len = avcodec_decode_video(c, picture, &got_picture,
NULL, 0);
avpkt.data = NULL;
avpkt.size = 0;
len = avcodec_decode_video2(c, picture, &got_picture, &avpkt);
if (got_picture) {
printf("saving last frame %3d\n", frame);
fflush(stdout);