generic-library/ffmpeg
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ffmpeg: Factorize video resampling.

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This commit is contained in:
Alex Converse 2011-08-30 04:51:52 +02:00 committed by Michael Niedermayer
parent dadbebbbbc
commit ebf94f439e
1 changed files with 60 additions and 51 deletions
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111
ffmpeg.c
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@ -1073,14 +1073,71 @@ static void do_subtitle_out(AVFormatContext *s,
static int bit_buffer_size= 1024*256;
static uint8_t *bit_buffer= NULL;
static void do_video_resample(OutputStream *ost,
InputStream *ist,
AVFrame *in_picture,
AVFrame **out_picture)
{
int resample_changed = 0;
AVCodecContext *dec = ist->st->codec;
*out_picture = in_picture;
#if !CONFIG_AVFILTER
resample_changed = ost->resample_width != dec->width ||
ost->resample_height != dec->height ||
ost->resample_pix_fmt != dec->pix_fmt;
if (resample_changed) {
av_log(NULL, AV_LOG_INFO,
"Input stream #%d.%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
ist->file_index, ist->st->index,
ost->resample_width, ost->resample_height, av_get_pix_fmt_name(ost->resample_pix_fmt),
dec->width , dec->height , av_get_pix_fmt_name(dec->pix_fmt));
ost->resample_width = dec->width;
ost->resample_height = dec->height;
ost->resample_pix_fmt = dec->pix_fmt;
}
ost->video_resample = dec->width != enc->width ||
dec->height != enc->height ||
dec->pix_fmt != enc->pix_fmt;
if (ost->video_resample) {
*out_picture = &ost->resample_frame;
if (!ost->img_resample_ctx || resample_changed) {
/* initialize the destination picture */
if (!ost->resample_frame.data[0]) {
avcodec_get_frame_defaults(&ost->resample_frame);
if (avpicture_alloc((AVPicture *)&ost->resample_frame, enc->pix_fmt,
enc->width, enc->height)) {
fprintf(stderr, "Cannot allocate temp picture, check pix fmt\n");
exit_program(1);
}
}
/* initialize a new scaler context */
sws_freeContext(ost->img_resample_ctx);
ost->img_resample_ctx = sws_getContext(dec->width, dec->height, dec->pix_fmt,
enc->width, enc->height, enc->pix_fmt,
ost->sws_flags, NULL, NULL, NULL);
if (ost->img_resample_ctx == NULL) {
fprintf(stderr, "Cannot get resampling context\n");
exit_program(1);
}
}
sws_scale(ost->img_resample_ctx, in_picture->data, in_picture->linesize,
0, ost->resample_height, (*out_picture)->data, (*out_picture)->linesize);
}
#endif
}
static void do_video_out(AVFormatContext *s,
OutputStream *ost,
InputStream *ist,
AVFrame *in_picture,
int *frame_size, float quality)
{
int nb_frames, i, ret, av_unused resample_changed;
AVFrame *final_picture, *formatted_picture;
int nb_frames, i, ret;
AVFrame *final_picture;
AVCodecContext *enc, *dec;
double sync_ipts;
@ -1123,55 +1180,7 @@ static void do_video_out(AVFormatContext *s,
if (nb_frames <= 0)
return;
formatted_picture = in_picture;
final_picture = formatted_picture;
#if !CONFIG_AVFILTER
resample_changed = ost->resample_width != dec->width ||
ost->resample_height != dec->height ||
ost->resample_pix_fmt != dec->pix_fmt;
if (resample_changed) {
av_log(NULL, AV_LOG_INFO,
"Input stream #%d.%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
ist->file_index, ist->st->index,
ost->resample_width, ost->resample_height, av_get_pix_fmt_name(ost->resample_pix_fmt),
dec->width , dec->height , av_get_pix_fmt_name(dec->pix_fmt));
ost->resample_width = dec->width;
ost->resample_height = dec->height;
ost->resample_pix_fmt = dec->pix_fmt;
}
ost->video_resample = dec->width != enc->width ||
dec->height != enc->height ||
dec->pix_fmt != enc->pix_fmt;
if (ost->video_resample) {
final_picture = &ost->resample_frame;
if (!ost->img_resample_ctx || resample_changed) {
/* initialize the destination picture */
if (!ost->resample_frame.data[0]) {
avcodec_get_frame_defaults(&ost->resample_frame);
if (avpicture_alloc((AVPicture *)&ost->resample_frame, enc->pix_fmt,
enc->width, enc->height)) {
fprintf(stderr, "Cannot allocate temp picture, check pix fmt\n");
exit_program(1);
}
}
/* initialize a new scaler context */
sws_freeContext(ost->img_resample_ctx);
ost->img_resample_ctx = sws_getContext(dec->width, dec->height, dec->pix_fmt,
enc->width, enc->height, enc->pix_fmt,
ost->sws_flags, NULL, NULL, NULL);
if (ost->img_resample_ctx == NULL) {
fprintf(stderr, "Cannot get resampling context\n");
exit_program(1);
}
}
sws_scale(ost->img_resample_ctx, formatted_picture->data, formatted_picture->linesize,
0, ost->resample_height, final_picture->data, final_picture->linesize);
}
#endif
do_video_resample(ost, ist, in_picture, &final_picture);
/* duplicates frame if needed */
for(i=0;i<nb_frames;i++) {