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Code Issues Releases Activity

avformat/yuv4mpegenc: Write data generically via AVPixFmtDescriptor

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Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2021-08-03 00:57:13 +02:00
parent 9ffa49496d
commit dccd1d2a58
1 changed files with 14 additions and 73 deletions
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87
libavformat/yuv4mpegenc.c
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@@ -181,9 +181,8 @@ static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
AVStream *st = s->streams[pkt->stream_index];
AVIOContext *pb = s->pb;
const AVFrame *frame = (const AVFrame *)pkt->data;
int width, height, h_chroma_shift, v_chroma_shift;
int i;
const uint8_t *ptr, *ptr1, *ptr2;
int width, height;
const AVPixFmtDescriptor *desc;
/* construct frame header */
@@ -191,79 +190,21 @@ static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
width = st->codecpar->width;
height = st->codecpar->height;
desc = av_pix_fmt_desc_get(st->codecpar->format);
ptr = frame->data[0];
/* The following code presumes all planes to be non-interleaved. */
for (int k = 0; k < desc->nb_components; k++) {
int plane_height = height, plane_width = width * desc->comp[k].step;
const uint8_t *ptr = frame->data[k];
switch (st->codecpar->format) {
case AV_PIX_FMT_GRAY8:
case AV_PIX_FMT_YUV411P:
case AV_PIX_FMT_YUV420P:
case AV_PIX_FMT_YUV422P:
case AV_PIX_FMT_YUV444P:
case AV_PIX_FMT_YUVA444P:
// TODO: remove YUVJ pixel formats when they are completely removed from the codebase.
case AV_PIX_FMT_YUVJ420P:
case AV_PIX_FMT_YUVJ422P:
case AV_PIX_FMT_YUVJ444P:
break;
case AV_PIX_FMT_GRAY9:
case AV_PIX_FMT_GRAY10:
case AV_PIX_FMT_GRAY12:
case AV_PIX_FMT_GRAY16:
case AV_PIX_FMT_YUV420P9:
case AV_PIX_FMT_YUV422P9:
case AV_PIX_FMT_YUV444P9:
case AV_PIX_FMT_YUV420P10:
case AV_PIX_FMT_YUV422P10:
case AV_PIX_FMT_YUV444P10:
case AV_PIX_FMT_YUV420P12:
case AV_PIX_FMT_YUV422P12:
case AV_PIX_FMT_YUV444P12:
case AV_PIX_FMT_YUV420P14:
case AV_PIX_FMT_YUV422P14:
case AV_PIX_FMT_YUV444P14:
case AV_PIX_FMT_YUV420P16:
case AV_PIX_FMT_YUV422P16:
case AV_PIX_FMT_YUV444P16:
width *= 2;
break;
default:
av_log(s, AV_LOG_ERROR, "The pixel format '%s' is not supported.\n",
av_get_pix_fmt_name(st->codecpar->format));
return AVERROR(EINVAL);
}
for (i = 0; i < height; i++) {
avio_write(pb, ptr, width);
ptr += frame->linesize[0];
}
if (st->codecpar->format != AV_PIX_FMT_GRAY8 && st->codecpar->format != AV_PIX_FMT_GRAY9 &&
st->codecpar->format != AV_PIX_FMT_GRAY10 && st->codecpar->format != AV_PIX_FMT_GRAY12 &&
st->codecpar->format != AV_PIX_FMT_GRAY16) {
// Adjust for smaller Cb and Cr planes
av_pix_fmt_get_chroma_sub_sample(st->codecpar->format, &h_chroma_shift,
&v_chroma_shift);
// Shift right, rounding up
width = AV_CEIL_RSHIFT(width, h_chroma_shift);
height = AV_CEIL_RSHIFT(height, v_chroma_shift);
ptr1 = frame->data[1];
ptr2 = frame->data[2];
for (i = 0; i < height; i++) { /* Cb */
avio_write(pb, ptr1, width);
ptr1 += frame->linesize[1];
if (desc->nb_components >= 3 && (k == 1 || k == 2)) { /* chroma? */
plane_width = AV_CEIL_RSHIFT(plane_width, desc->log2_chroma_w);
plane_height = AV_CEIL_RSHIFT(plane_height, desc->log2_chroma_h);
}
for (i = 0; i < height; i++) { /* Cr */
avio_write(pb, ptr2, width);
ptr2 += frame->linesize[2];
}
if (st->codecpar->format == AV_PIX_FMT_YUVA444P) {
ptr = frame->data[3];
for (i = 0; i < height; i++) { /* A */
avio_write(pb, ptr, width);
ptr += frame->linesize[3];
}
for (int i = 0; i < plane_height; i++) {
avio_write(pb, ptr, plane_width);
ptr += frame->linesize[k];
}
}