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Support 4:2:2 and 4:4:4 subsampling in libtheora encoding

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Originally committed as revision 20582 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2009-11-22 21:08:43 +00:00
parent b0a6d9ca86
commit af89b1781f
1 changed files with 17 additions and 8 deletions
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25
libavcodec/libtheoraenc.c
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@ -44,6 +44,8 @@ typedef struct TheoraContext {
uint8_t *stats;
int stats_size;
int stats_offset;
int uv_hshift;
int uv_vshift;
} TheoraContext;
/*!
@ -167,7 +169,18 @@ static av_cold int encode_init(AVCodecContext* avc_context)
t_info.aspect_denominator = 1;
}
t_info.colorspace = TH_CS_UNSPECIFIED;
t_info.pixel_fmt = TH_PF_420;
if (avc_context->pix_fmt == PIX_FMT_YUV420P)
t_info.pixel_fmt = TH_PF_420;
else if (avc_context->pix_fmt == PIX_FMT_YUV422P)
t_info.pixel_fmt = TH_PF_422;
else if (avc_context->pix_fmt == PIX_FMT_YUV444P)
t_info.pixel_fmt = TH_PF_444;
else {
av_log(avc_context, AV_LOG_ERROR, "Unsupported pix_fmt\n");
return -1;
}
avcodec_get_chroma_sub_sample(avc_context->pix_fmt, &h->uv_hshift, &h->uv_vshift);
if (avc_context->flags & CODEC_FLAG_QSCALE) {
/* to be constant with the libvorbis implementation, clip global_quality to 0 - 10
@ -240,8 +253,6 @@ static int encode_frame(AVCodecContext* avc_context, uint8_t *outbuf,
ogg_packet o_packet;
int result, i;
assert(avc_context->pix_fmt == PIX_FMT_YUV420P);
// EOS, finish and get 1st pass stats if applicable
if (!frame) {
th_encode_packetout(h->t_state, 1, &o_packet);
@ -253,8 +264,8 @@ static int encode_frame(AVCodecContext* avc_context, uint8_t *outbuf,
/* Copy planes to the theora yuv_buffer */
for (i = 0; i < 3; i++) {
t_yuv_buffer[i].width = FFALIGN(avc_context->width, 16) >> !!i;
t_yuv_buffer[i].height = FFALIGN(avc_context->height, 16) >> !!i;
t_yuv_buffer[i].width = FFALIGN(avc_context->width, 16) >> (i && h->uv_hshift);
t_yuv_buffer[i].height = FFALIGN(avc_context->height, 16) >> (i && h->uv_vshift);
t_yuv_buffer[i].stride = frame->linesize[i];
t_yuv_buffer[i].data = frame->data[i];
}
@ -327,8 +338,6 @@ static av_cold int encode_close(AVCodecContext* avc_context)
return 0;
}
static const enum PixelFormat supported_pixel_formats[] = { PIX_FMT_YUV420P, PIX_FMT_NONE };
/*! AVCodec struct exposed to libavcodec */
AVCodec libtheora_encoder = {
.name = "libtheora",
@ -339,6 +348,6 @@ AVCodec libtheora_encoder = {
.close = encode_close,
.encode = encode_frame,
.capabilities = CODEC_CAP_DELAY, // needed to get the statsfile summary
.pix_fmts = supported_pixel_formats,
.pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("libtheora Theora"),
};