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fixing api-example

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Originally committed as revision 1320 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-12-06 17:39:32 +00:00
parent 426b80615b
commit 6c16199b43
1 changed files with 20 additions and 16 deletions
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36
libavcodec/apiexample.c
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@ -164,7 +164,7 @@ void video_encode_example(const char *filename)
AVCodecContext *c= NULL; AVCodecContext *c= NULL;
int i, out_size, size, x, y, outbuf_size; int i, out_size, size, x, y, outbuf_size;
FILE *f; FILE *f;
AVPicture picture; AVVideoFrame *picture;
UINT8 *outbuf, *picture_buf; UINT8 *outbuf, *picture_buf;
printf("Video encoding\n"); printf("Video encoding\n");
@ -177,6 +177,7 @@ void video_encode_example(const char *filename)
} }
c= avcodec_alloc_context(); c= avcodec_alloc_context();
picture= avcodec_alloc_picture();
/* put sample parameters */ /* put sample parameters */
c->bit_rate = 400000; c->bit_rate = 400000;
@ -207,12 +208,12 @@ void video_encode_example(const char *filename)
size = c->width * c->height; size = c->width * c->height;
picture_buf = malloc((size * 3) / 2); /* size for YUV 420 */ picture_buf = malloc((size * 3) / 2); /* size for YUV 420 */
picture.data[0] = picture_buf; picture->data[0] = picture_buf;
picture.data[1] = picture.data[0] + size; picture->data[1] = picture->data[0] + size;
picture.data[2] = picture.data[1] + size / 4; picture->data[2] = picture->data[1] + size / 4;
picture.linesize[0] = c->width; picture->linesize[0] = c->width;
picture.linesize[1] = c->width / 2; picture->linesize[1] = c->width / 2;
picture.linesize[2] = c->width / 2; picture->linesize[2] = c->width / 2;
/* encode 1 second of video */ /* encode 1 second of video */
for(i=0;i<25;i++) { for(i=0;i<25;i++) {
@ -222,20 +223,20 @@ void video_encode_example(const char *filename)
/* Y */ /* Y */
for(y=0;y<c->height;y++) { for(y=0;y<c->height;y++) {
for(x=0;x<c->width;x++) { for(x=0;x<c->width;x++) {
picture.data[0][y * picture.linesize[0] + x] = x + y + i * 3; picture->data[0][y * picture->linesize[0] + x] = x + y + i * 3;
} }
} }
/* Cb and Cr */ /* Cb and Cr */
for(y=0;y<c->height/2;y++) { for(y=0;y<c->height/2;y++) {
for(x=0;x<c->width/2;x++) { for(x=0;x<c->width/2;x++) {
picture.data[1][y * picture.linesize[1] + x] = 128 + y + i * 2; picture->data[1][y * picture->linesize[1] + x] = 128 + y + i * 2;
picture.data[2][y * picture.linesize[2] + x] = 64 + x + i * 5; picture->data[2][y * picture->linesize[2] + x] = 64 + x + i * 5;
} }
} }
/* encode the image */ /* encode the image */
out_size = avcodec_encode_video(c, outbuf, outbuf_size, &picture); out_size = avcodec_encode_video(c, outbuf, outbuf_size, picture);
fwrite(outbuf, 1, out_size, f); fwrite(outbuf, 1, out_size, f);
} }
@ -251,6 +252,7 @@ void video_encode_example(const char *filename)
avcodec_close(c); avcodec_close(c);
free(c); free(c);
free(picture);
printf("\n"); printf("\n");
} }
@ -276,7 +278,7 @@ void video_decode_example(const char *outfilename, const char *filename)
AVCodecContext *c= NULL; AVCodecContext *c= NULL;
int frame, size, got_picture, len; int frame, size, got_picture, len;
FILE *f; FILE *f;
AVPicture picture; AVVideoFrame *picture;
UINT8 inbuf[INBUF_SIZE], *inbuf_ptr; UINT8 inbuf[INBUF_SIZE], *inbuf_ptr;
char buf[1024]; char buf[1024];
@ -290,6 +292,7 @@ void video_decode_example(const char *outfilename, const char *filename)
} }
c= avcodec_alloc_context(); c= avcodec_alloc_context();
picture= avcodec_alloc_picture();
if(codec->capabilities&CODEC_CAP_TRUNCATED) if(codec->capabilities&CODEC_CAP_TRUNCATED)
c->flags|= CODEC_FLAG_TRUNCATED; /* we dont send complete frames */ c->flags|= CODEC_FLAG_TRUNCATED; /* we dont send complete frames */
@ -335,7 +338,7 @@ void video_decode_example(const char *outfilename, const char *filename)
feed decoder and see if it could decode a frame */ feed decoder and see if it could decode a frame */
inbuf_ptr = inbuf; inbuf_ptr = inbuf;
while (size > 0) { while (size > 0) {
len = avcodec_decode_video(c, &picture, &got_picture, len = avcodec_decode_video(c, picture, &got_picture,
inbuf_ptr, size); inbuf_ptr, size);
if (len < 0) { if (len < 0) {
fprintf(stderr, "Error while decoding frame %d\n", frame); fprintf(stderr, "Error while decoding frame %d\n", frame);
@ -348,7 +351,7 @@ void video_decode_example(const char *outfilename, const char *filename)
/* the picture is allocated by the decoder. no need to /* the picture is allocated by the decoder. no need to
free it */ free it */
snprintf(buf, sizeof(buf), outfilename, frame); snprintf(buf, sizeof(buf), outfilename, frame);
pgm_save(picture.data[0], picture.linesize[0], pgm_save(picture->data[0], picture->linesize[0],
c->width, c->height, buf); c->width, c->height, buf);
frame++; frame++;
} }
@ -360,7 +363,7 @@ void video_decode_example(const char *outfilename, const char *filename)
/* some codecs, such as MPEG, transmit the I and P frame with a /* 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 latency of one frame. You must do the following to have a
chance to get the last frame of the video */ chance to get the last frame of the video */
len = avcodec_decode_video(c, &picture, &got_picture, len = avcodec_decode_video(c, picture, &got_picture,
NULL, 0); NULL, 0);
if (got_picture) { if (got_picture) {
printf("saving frame %3d\r", frame); printf("saving frame %3d\r", frame);
@ -369,7 +372,7 @@ void video_decode_example(const char *outfilename, const char *filename)
/* the picture is allocated by the decoder. no need to /* the picture is allocated by the decoder. no need to
free it */ free it */
snprintf(buf, sizeof(buf), outfilename, frame); snprintf(buf, sizeof(buf), outfilename, frame);
pgm_save(picture.data[0], picture.linesize[0], pgm_save(picture->data[0], picture->linesize[0],
c->width, c->height, buf); c->width, c->height, buf);
frame++; frame++;
} }
@ -378,6 +381,7 @@ void video_decode_example(const char *outfilename, const char *filename)
avcodec_close(c); avcodec_close(c);
free(c); free(c);
free(picture);
printf("\n"); printf("\n");
} }