void ffmpeg_native_reader::init_video_codec()
{
if(strcoll(codec, "JPEG")==0)
{
video_codec = avcodec_find_decoder(AV_CODEC_ID_MJPEG);
}
else if(strcoll(codec, "H264")==0)
{
video_codec = avcodec_find_decoder(AV_CODEC_ID_H264);
}
else if(strcoll(codec, "MPEG4")==0)
{
video_codec = avcodec_find_decoder(AV_CODEC_ID_MPEG4);
}
video_codec_context = avcodec_alloc_context3(video_codec);
video_codec_context->codec_type = AVMEDIA_TYPE_VIDEO;
video_codec_context->pix_fmt = PIX_FMT_YUV420P;
video_codec_context->width=width;
video_codec_context->height=height;
if (avcodec_open2(video_codec_context, video_codec, NULL) < 0)
throw std::exception("ffmpeg: Unable to open video codec");
alloc_frames();
}
void gavl_audio_convert(gavl_audio_converter_t * cnv,
const gavl_audio_frame_t * input_frame,
gavl_audio_frame_t * output_frame)
{
int i;
gavl_audio_convert_context_t * ctx;
cnv->contexts->input_frame = input_frame;
cnv->last_context->output_frame = output_frame;
alloc_frames(cnv, input_frame->valid_samples, -1.0);
ctx = cnv->contexts;
for(i = 0; i < cnv->num_conversions; i++)
{
ctx->output_frame->valid_samples = 0;
if(ctx->func)
{
ctx->func(ctx);
if(!ctx->output_frame->valid_samples)
ctx->output_frame->valid_samples = ctx->input_frame->valid_samples;
if(ctx->output_format.samplerate != ctx->input_format.samplerate)
ctx->output_frame->timestamp =
gavl_time_rescale(ctx->input_format.samplerate,
ctx->output_format.samplerate,
ctx->input_frame->timestamp);
else
ctx->output_frame->timestamp = ctx->input_frame->timestamp;
}
ctx = ctx->next;
}
}
void gavl_audio_converter_resample(gavl_audio_converter_t * cnv,
gavl_audio_frame_t * input_frame,
gavl_audio_frame_t * output_frame,
double ratio)
{
gavl_audio_convert_context_t * ctx;
cnv->contexts->input_frame = input_frame;
cnv->last_context->output_frame = output_frame;
alloc_frames(cnv, input_frame->valid_samples, ratio);
ctx = cnv->contexts;
while(ctx)
{
ctx->output_frame->valid_samples = 0;
if (ctx->samplerate_converter != NULL)
{
if (ctx->samplerate_converter->ratio != ratio )
{
//ctx->output_format.samplerate = ctx->input_format.samplerate * ratio;
ctx->samplerate_converter->ratio = ratio;
ctx->samplerate_converter->data.src_ratio = ratio;
//for (j=0; j < ctx->samplerate_converter->num_resamplers; j++)
// gavl_src_set_ratio( ctx->samplerate_converter->resamplers[j], ratio);
}
}
if(ctx->func)
{
ctx->func(ctx);
// DO WE NEED THIS HERE???
if(!ctx->output_frame->valid_samples)
ctx->output_frame->valid_samples = ctx->input_frame->valid_samples;
ctx->output_frame->timestamp = ctx->input_frame->timestamp;
}
ctx = ctx->next;
}
}
void gavl_video_convert(gavl_video_converter_t * cnv,
const gavl_video_frame_t * input_frame,
gavl_video_frame_t * output_frame)
{
gavl_video_convert_context_t * tmp_ctx;
alloc_frames(cnv);
cnv->first_context->input_frame = input_frame;
cnv->last_context->output_frame = output_frame;
tmp_ctx = cnv->first_context;
while(tmp_ctx)
{
gavl_video_frame_copy_metadata(tmp_ctx->output_frame,
tmp_ctx->input_frame);
tmp_ctx->func(tmp_ctx);
tmp_ctx = tmp_ctx->next;
}
}
