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sgienc: Support encoding high bit depth images with RLE

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Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
This commit is contained in:
Vittorio Giovara 2015-11-20 02:17:34 +01:00
parent 59e3f4e598
commit 4a0918cae6
2 changed files with 12 additions and 10 deletions
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1
Changelog
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@ -47,6 +47,7 @@ version <next>:
- zero-copy Intel QSV transcoding in avconv
- libkvazaar HEVC encoder
- innoHeim/Rsupport Screen Capture Codec decoder
- support encoding 16-bit RLE SGI images
version 11:

21
libavcodec/sgienc.c
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@ -45,7 +45,10 @@ static int sgi_rle_encode(PutByteContext *pbc, const uint8_t *src,
int val, count, x, start = bytestream2_tell_p(pbc);
void (*bytestream2_put)(PutByteContext *, unsigned int);
bytestream2_put = bytestream2_put_byte;
if (bpp == 1)
bytestream2_put = bytestream2_put_byte;
else
bytestream2_put = bytestream2_put_be16;
for (x = 0; x < w; x += count) {
/* see if we can encode the next set of pixels with RLE */
@ -54,7 +57,7 @@ static int sgi_rle_encode(PutByteContext *pbc, const uint8_t *src,
if (bytestream2_get_bytes_left_p(pbc) < bpp * 2)
return AVERROR_INVALIDDATA;
val = *src;
val = bpp == 1 ? *src : AV_RB16(src);
bytestream2_put(pbc, count);
bytestream2_put(pbc, val);
} else {
@ -66,7 +69,7 @@ static int sgi_rle_encode(PutByteContext *pbc, const uint8_t *src,
bytestream2_put(pbc, count + 0x80);
for (i = 0; i < count; i++) {
val = src[i];
val = bpp == 1 ? src[i] : AV_RB16(src + i * bpp);
bytestream2_put(pbc, val);
}
}
@ -116,7 +119,6 @@ FF_ENABLE_DEPRECATION_WARNINGS
case AV_PIX_FMT_GRAY16LE:
put_be = !HAVE_BIGENDIAN;
case AV_PIX_FMT_GRAY16BE:
avctx->coder_type = FF_CODER_TYPE_RAW;
bytes_per_channel = 2;
pixmax = 0xFFFF;
dimension = SGI_SINGLE_CHAN;
@ -125,7 +127,6 @@ FF_ENABLE_DEPRECATION_WARNINGS
case AV_PIX_FMT_RGB48LE:
put_be = !HAVE_BIGENDIAN;
case AV_PIX_FMT_RGB48BE:
avctx->coder_type = FF_CODER_TYPE_RAW;
bytes_per_channel = 2;
pixmax = 0xFFFF;
dimension = SGI_MULTI_CHAN;
@ -134,7 +135,6 @@ FF_ENABLE_DEPRECATION_WARNINGS
case AV_PIX_FMT_RGBA64LE:
put_be = !HAVE_BIGENDIAN;
case AV_PIX_FMT_RGBA64BE:
avctx->coder_type = FF_CODER_TYPE_RAW;
bytes_per_channel = 2;
pixmax = 0xFFFF;
dimension = SGI_MULTI_CHAN;
@ -192,19 +192,20 @@ FF_ENABLE_DEPRECATION_WARNINGS
bytestream2_skip_p(&pbc, tablesize);
/* Make an intermediate consecutive buffer. */
if (!(encode_buf = av_malloc(width)))
if (!(encode_buf = av_malloc(width * bytes_per_channel)))
return -1;
for (z = 0; z < depth; z++) {
in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
in_buf = p->data[0] + p->linesize[0] * (height - 1) + z * bytes_per_channel;
for (y = 0; y < height; y++) {
bytestream2_put_be32(&taboff_pcb, bytestream2_tell_p(&pbc));
for (x = 0; x < width; x++)
for (x = 0; x < width * bytes_per_channel; x += bytes_per_channel)
encode_buf[x] = in_buf[depth * x];
length = sgi_rle_encode(&pbc, encode_buf, width, 1);
length = sgi_rle_encode(&pbc, encode_buf, width,
bytes_per_channel);
if (length < 1) {
av_free(encode_buf);
return -1;