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libmpeg2: Decode only Y on grayscale targets. The chroma skip code is probably less than optimal since it's basically the decoding code with minimum reading of the bitstream but it does the trick for now and gets some more FPS.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16093 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2008-01-16 01:22:56 +00:00
parent 74d61058dc
commit 0c7f2372d5
7 changed files with 680 additions and 115 deletions
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32
apps/plugins/mpegplayer/header.c
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@ -102,8 +102,10 @@ void mpeg2_header_state_init (mpeg2dec_t * mpeg2dec)
i < mpeg2dec->alloc_index; i++)
{
mpeg2_free(mpeg2dec->fbuf_alloc[i].fbuf.buf[0]);
#if MPEG2_COLOR
mpeg2_free(mpeg2dec->fbuf_alloc[i].fbuf.buf[1]);
mpeg2_free(mpeg2dec->fbuf_alloc[i].fbuf.buf[2]);
#endif
}
}
@ -113,8 +115,10 @@ void mpeg2_header_state_init (mpeg2dec_t * mpeg2dec)
for (i = 0; i < 3; i++)
{
mpeg2_free(mpeg2dec->yuv_buf[i][0]);
#if MPEG2_COLOR
mpeg2_free(mpeg2dec->yuv_buf[i][1]);
mpeg2_free(mpeg2dec->yuv_buf[i][2]);
#endif
}
}
@ -840,8 +844,6 @@ void mpeg2_header_picture_finalize (mpeg2dec_t * mpeg2dec)
if (!mpeg2dec->convert_start)
{
int y_size, uv_size;
mpeg2dec->decoder.convert_id =
mpeg2_malloc (mpeg2dec->convert_id_size,
MPEG2_ALLOC_CONVERT_ID);
@ -855,32 +857,39 @@ void mpeg2_header_picture_finalize (mpeg2dec_t * mpeg2dec)
mpeg2dec->convert_start = convert_init.start;
mpeg2dec->decoder.convert = convert_init.copy;
y_size = decoder->stride_frame * mpeg2dec->sequence.height;
uv_size = y_size >> (2 - mpeg2dec->decoder.chroma_format);
int y_size = decoder->stride_frame * mpeg2dec->sequence.height;
mpeg2dec->yuv_buf[0][0] =
(uint8_t *) mpeg2_malloc(y_size, MPEG2_ALLOC_YUV);
#if MPEG2_COLOR
int uv_size = y_size >> (2 - mpeg2dec->decoder.chroma_format);
mpeg2dec->yuv_buf[0][1] =
(uint8_t *) mpeg2_malloc(uv_size, MPEG2_ALLOC_YUV);
mpeg2dec->yuv_buf[0][2] =
(uint8_t *) mpeg2_malloc(uv_size, MPEG2_ALLOC_YUV);
#endif
mpeg2dec->yuv_buf[1][0] =
(uint8_t *) mpeg2_malloc(y_size, MPEG2_ALLOC_YUV);
#if MPEG2_COLOR
mpeg2dec->yuv_buf[1][1] =
(uint8_t *) mpeg2_malloc(uv_size, MPEG2_ALLOC_YUV);
mpeg2dec->yuv_buf[1][2] =
(uint8_t *) mpeg2_malloc(uv_size, MPEG2_ALLOC_YUV);
#endif
y_size = decoder->stride_frame * 32;
uv_size = y_size >> (2 - mpeg2dec->decoder.chroma_format);
mpeg2dec->yuv_buf[2][0] =
(uint8_t *) mpeg2_malloc(y_size, MPEG2_ALLOC_YUV);
#if MPEG2_COLOR
uv_size = y_size >> (2 - mpeg2dec->decoder.chroma_format);
mpeg2dec->yuv_buf[2][1] =
(uint8_t *) mpeg2_malloc(uv_size, MPEG2_ALLOC_YUV);
mpeg2dec->yuv_buf[2][2] =
(uint8_t *) mpeg2_malloc(uv_size, MPEG2_ALLOC_YUV);
#endif
}
if (!mpeg2dec->custom_fbuf)
@ -895,13 +904,16 @@ void mpeg2_header_picture_finalize (mpeg2dec_t * mpeg2dec)
fbuf->buf[0] =
(uint8_t *) mpeg2_malloc (convert_init.buf_size[0],
MPEG2_ALLOC_CONVERTED);
#if MPEG2_COLOR
fbuf->buf[1] =
(uint8_t *) mpeg2_malloc (convert_init.buf_size[1],
MPEG2_ALLOC_CONVERTED);
fbuf->buf[2] =
(uint8_t *) mpeg2_malloc (convert_init.buf_size[2],
MPEG2_ALLOC_CONVERTED);
#endif
}
mpeg2_set_fbuf (mpeg2dec, (decoder->coding_type == B_TYPE));
}
}
@ -910,21 +922,23 @@ void mpeg2_header_picture_finalize (mpeg2dec_t * mpeg2dec)
while (mpeg2dec->alloc_index < 3)
{
mpeg2_fbuf_t * fbuf;
int y_size, uv_size;
fbuf = &mpeg2dec->fbuf_alloc[mpeg2dec->alloc_index++].fbuf;
fbuf->id = NULL;
y_size = decoder->stride_frame * mpeg2dec->sequence.height;
uv_size = y_size >> (2 - decoder->chroma_format);
int y_size = decoder->stride_frame * mpeg2dec->sequence.height;
fbuf->buf[0] = (uint8_t *) mpeg2_malloc (y_size,
MPEG2_ALLOC_YUV);
#if MPEG2_COLOR
int uv_size = y_size >> (2 - decoder->chroma_format);
fbuf->buf[1] = (uint8_t *) mpeg2_malloc (uv_size,
MPEG2_ALLOC_YUV);
fbuf->buf[2] = (uint8_t *) mpeg2_malloc (uv_size,
MPEG2_ALLOC_YUV);
#endif
}
mpeg2_set_fbuf (mpeg2dec, (decoder->coding_type == B_TYPE));