0,0 → 1,555 |
/* |
* Ut Video decoder |
* Copyright (c) 2011 Konstantin Shishkov |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
/** |
* @file |
* Ut Video decoder |
*/ |
|
#include <stdlib.h> |
|
#include "libavutil/intreadwrite.h" |
#include "avcodec.h" |
#include "bytestream.h" |
#include "get_bits.h" |
#include "dsputil.h" |
#include "thread.h" |
#include "utvideo.h" |
|
static int build_huff(const uint8_t *src, VLC *vlc, int *fsym) |
{ |
int i; |
HuffEntry he[256]; |
int last; |
uint32_t codes[256]; |
uint8_t bits[256]; |
uint8_t syms[256]; |
uint32_t code; |
|
*fsym = -1; |
for (i = 0; i < 256; i++) { |
he[i].sym = i; |
he[i].len = *src++; |
} |
qsort(he, 256, sizeof(*he), ff_ut_huff_cmp_len); |
|
if (!he[0].len) { |
*fsym = he[0].sym; |
return 0; |
} |
if (he[0].len > 32) |
return -1; |
|
last = 255; |
while (he[last].len == 255 && last) |
last--; |
|
code = 1; |
for (i = last; i >= 0; i--) { |
codes[i] = code >> (32 - he[i].len); |
bits[i] = he[i].len; |
syms[i] = he[i].sym; |
code += 0x80000000u >> (he[i].len - 1); |
} |
|
return ff_init_vlc_sparse(vlc, FFMIN(he[last].len, 10), last + 1, |
bits, sizeof(*bits), sizeof(*bits), |
codes, sizeof(*codes), sizeof(*codes), |
syms, sizeof(*syms), sizeof(*syms), 0); |
} |
|
static int decode_plane(UtvideoContext *c, int plane_no, |
uint8_t *dst, int step, int stride, |
int width, int height, |
const uint8_t *src, int use_pred) |
{ |
int i, j, slice, pix; |
int sstart, send; |
VLC vlc; |
GetBitContext gb; |
int prev, fsym; |
const int cmask = ~(!plane_no && c->avctx->pix_fmt == AV_PIX_FMT_YUV420P); |
|
if (build_huff(src, &vlc, &fsym)) { |
av_log(c->avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n"); |
return AVERROR_INVALIDDATA; |
} |
if (fsym >= 0) { // build_huff reported a symbol to fill slices with |
send = 0; |
for (slice = 0; slice < c->slices; slice++) { |
uint8_t *dest; |
|
sstart = send; |
send = (height * (slice + 1) / c->slices) & cmask; |
dest = dst + sstart * stride; |
|
prev = 0x80; |
for (j = sstart; j < send; j++) { |
for (i = 0; i < width * step; i += step) { |
pix = fsym; |
if (use_pred) { |
prev += pix; |
pix = prev; |
} |
dest[i] = pix; |
} |
dest += stride; |
} |
} |
return 0; |
} |
|
src += 256; |
|
send = 0; |
for (slice = 0; slice < c->slices; slice++) { |
uint8_t *dest; |
int slice_data_start, slice_data_end, slice_size; |
|
sstart = send; |
send = (height * (slice + 1) / c->slices) & cmask; |
dest = dst + sstart * stride; |
|
// slice offset and size validation was done earlier |
slice_data_start = slice ? AV_RL32(src + slice * 4 - 4) : 0; |
slice_data_end = AV_RL32(src + slice * 4); |
slice_size = slice_data_end - slice_data_start; |
|
if (!slice_size) { |
av_log(c->avctx, AV_LOG_ERROR, "Plane has more than one symbol " |
"yet a slice has a length of zero.\n"); |
goto fail; |
} |
|
memcpy(c->slice_bits, src + slice_data_start + c->slices * 4, |
slice_size); |
memset(c->slice_bits + slice_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
c->dsp.bswap_buf((uint32_t *) c->slice_bits, (uint32_t *) c->slice_bits, |
(slice_data_end - slice_data_start + 3) >> 2); |
init_get_bits(&gb, c->slice_bits, slice_size * 8); |
|
prev = 0x80; |
for (j = sstart; j < send; j++) { |
for (i = 0; i < width * step; i += step) { |
if (get_bits_left(&gb) <= 0) { |
av_log(c->avctx, AV_LOG_ERROR, |
"Slice decoding ran out of bits\n"); |
goto fail; |
} |
pix = get_vlc2(&gb, vlc.table, vlc.bits, 4); |
if (pix < 0) { |
av_log(c->avctx, AV_LOG_ERROR, "Decoding error\n"); |
goto fail; |
} |
if (use_pred) { |
prev += pix; |
pix = prev; |
} |
dest[i] = pix; |
} |
dest += stride; |
} |
if (get_bits_left(&gb) > 32) |
av_log(c->avctx, AV_LOG_WARNING, |
"%d bits left after decoding slice\n", get_bits_left(&gb)); |
} |
|
ff_free_vlc(&vlc); |
|
return 0; |
fail: |
ff_free_vlc(&vlc); |
return AVERROR_INVALIDDATA; |
} |
|
static void restore_rgb_planes(uint8_t *src, int step, int stride, int width, |
int height) |
{ |
int i, j; |
uint8_t r, g, b; |
|
for (j = 0; j < height; j++) { |
for (i = 0; i < width * step; i += step) { |
r = src[i]; |
g = src[i + 1]; |
b = src[i + 2]; |
src[i] = r + g - 0x80; |
src[i + 2] = b + g - 0x80; |
} |
src += stride; |
} |
} |
|
static void restore_median(uint8_t *src, int step, int stride, |
int width, int height, int slices, int rmode) |
{ |
int i, j, slice; |
int A, B, C; |
uint8_t *bsrc; |
int slice_start, slice_height; |
const int cmask = ~rmode; |
|
for (slice = 0; slice < slices; slice++) { |
slice_start = ((slice * height) / slices) & cmask; |
slice_height = ((((slice + 1) * height) / slices) & cmask) - |
slice_start; |
|
bsrc = src + slice_start * stride; |
|
// first line - left neighbour prediction |
bsrc[0] += 0x80; |
A = bsrc[0]; |
for (i = step; i < width * step; i += step) { |
bsrc[i] += A; |
A = bsrc[i]; |
} |
bsrc += stride; |
if (slice_height == 1) |
continue; |
// second line - first element has top prediction, the rest uses median |
C = bsrc[-stride]; |
bsrc[0] += C; |
A = bsrc[0]; |
for (i = step; i < width * step; i += step) { |
B = bsrc[i - stride]; |
bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C)); |
C = B; |
A = bsrc[i]; |
} |
bsrc += stride; |
// the rest of lines use continuous median prediction |
for (j = 2; j < slice_height; j++) { |
for (i = 0; i < width * step; i += step) { |
B = bsrc[i - stride]; |
bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C)); |
C = B; |
A = bsrc[i]; |
} |
bsrc += stride; |
} |
} |
} |
|
/* UtVideo interlaced mode treats every two lines as a single one, |
* so restoring function should take care of possible padding between |
* two parts of the same "line". |
*/ |
static void restore_median_il(uint8_t *src, int step, int stride, |
int width, int height, int slices, int rmode) |
{ |
int i, j, slice; |
int A, B, C; |
uint8_t *bsrc; |
int slice_start, slice_height; |
const int cmask = ~(rmode ? 3 : 1); |
const int stride2 = stride << 1; |
|
for (slice = 0; slice < slices; slice++) { |
slice_start = ((slice * height) / slices) & cmask; |
slice_height = ((((slice + 1) * height) / slices) & cmask) - |
slice_start; |
slice_height >>= 1; |
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bsrc = src + slice_start * stride; |
|
// first line - left neighbour prediction |
bsrc[0] += 0x80; |
A = bsrc[0]; |
for (i = step; i < width * step; i += step) { |
bsrc[i] += A; |
A = bsrc[i]; |
} |
for (i = 0; i < width * step; i += step) { |
bsrc[stride + i] += A; |
A = bsrc[stride + i]; |
} |
bsrc += stride2; |
if (slice_height == 1) |
continue; |
// second line - first element has top prediction, the rest uses median |
C = bsrc[-stride2]; |
bsrc[0] += C; |
A = bsrc[0]; |
for (i = step; i < width * step; i += step) { |
B = bsrc[i - stride2]; |
bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C)); |
C = B; |
A = bsrc[i]; |
} |
for (i = 0; i < width * step; i += step) { |
B = bsrc[i - stride]; |
bsrc[stride + i] += mid_pred(A, B, (uint8_t)(A + B - C)); |
C = B; |
A = bsrc[stride + i]; |
} |
bsrc += stride2; |
// the rest of lines use continuous median prediction |
for (j = 2; j < slice_height; j++) { |
for (i = 0; i < width * step; i += step) { |
B = bsrc[i - stride2]; |
bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C)); |
C = B; |
A = bsrc[i]; |
} |
for (i = 0; i < width * step; i += step) { |
B = bsrc[i - stride]; |
bsrc[i + stride] += mid_pred(A, B, (uint8_t)(A + B - C)); |
C = B; |
A = bsrc[i + stride]; |
} |
bsrc += stride2; |
} |
} |
} |
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static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
AVPacket *avpkt) |
{ |
const uint8_t *buf = avpkt->data; |
int buf_size = avpkt->size; |
UtvideoContext *c = avctx->priv_data; |
int i, j; |
const uint8_t *plane_start[5]; |
int plane_size, max_slice_size = 0, slice_start, slice_end, slice_size; |
int ret; |
GetByteContext gb; |
ThreadFrame frame = { .f = data }; |
|
if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) |
return ret; |
|
/* parse plane structure to get frame flags and validate slice offsets */ |
bytestream2_init(&gb, buf, buf_size); |
for (i = 0; i < c->planes; i++) { |
plane_start[i] = gb.buffer; |
if (bytestream2_get_bytes_left(&gb) < 256 + 4 * c->slices) { |
av_log(avctx, AV_LOG_ERROR, "Insufficient data for a plane\n"); |
return AVERROR_INVALIDDATA; |
} |
bytestream2_skipu(&gb, 256); |
slice_start = 0; |
slice_end = 0; |
for (j = 0; j < c->slices; j++) { |
slice_end = bytestream2_get_le32u(&gb); |
slice_size = slice_end - slice_start; |
if (slice_end < 0 || slice_size < 0 || |
bytestream2_get_bytes_left(&gb) < slice_end) { |
av_log(avctx, AV_LOG_ERROR, "Incorrect slice size\n"); |
return AVERROR_INVALIDDATA; |
} |
slice_start = slice_end; |
max_slice_size = FFMAX(max_slice_size, slice_size); |
} |
plane_size = slice_end; |
bytestream2_skipu(&gb, plane_size); |
} |
plane_start[c->planes] = gb.buffer; |
if (bytestream2_get_bytes_left(&gb) < c->frame_info_size) { |
av_log(avctx, AV_LOG_ERROR, "Not enough data for frame information\n"); |
return AVERROR_INVALIDDATA; |
} |
c->frame_info = bytestream2_get_le32u(&gb); |
av_log(avctx, AV_LOG_DEBUG, "frame information flags %X\n", c->frame_info); |
|
c->frame_pred = (c->frame_info >> 8) & 3; |
|
if (c->frame_pred == PRED_GRADIENT) { |
avpriv_request_sample(avctx, "Frame with gradient prediction"); |
return AVERROR_PATCHWELCOME; |
} |
|
av_fast_malloc(&c->slice_bits, &c->slice_bits_size, |
max_slice_size + FF_INPUT_BUFFER_PADDING_SIZE); |
|
if (!c->slice_bits) { |
av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n"); |
return AVERROR(ENOMEM); |
} |
|
switch (c->avctx->pix_fmt) { |
case AV_PIX_FMT_RGB24: |
case AV_PIX_FMT_RGBA: |
for (i = 0; i < c->planes; i++) { |
ret = decode_plane(c, i, frame.f->data[0] + ff_ut_rgb_order[i], |
c->planes, frame.f->linesize[0], avctx->width, |
avctx->height, plane_start[i], |
c->frame_pred == PRED_LEFT); |
if (ret) |
return ret; |
if (c->frame_pred == PRED_MEDIAN) { |
if (!c->interlaced) { |
restore_median(frame.f->data[0] + ff_ut_rgb_order[i], |
c->planes, frame.f->linesize[0], avctx->width, |
avctx->height, c->slices, 0); |
} else { |
restore_median_il(frame.f->data[0] + ff_ut_rgb_order[i], |
c->planes, frame.f->linesize[0], |
avctx->width, avctx->height, c->slices, |
0); |
} |
} |
} |
restore_rgb_planes(frame.f->data[0], c->planes, frame.f->linesize[0], |
avctx->width, avctx->height); |
break; |
case AV_PIX_FMT_YUV420P: |
for (i = 0; i < 3; i++) { |
ret = decode_plane(c, i, frame.f->data[i], 1, frame.f->linesize[i], |
avctx->width >> !!i, avctx->height >> !!i, |
plane_start[i], c->frame_pred == PRED_LEFT); |
if (ret) |
return ret; |
if (c->frame_pred == PRED_MEDIAN) { |
if (!c->interlaced) { |
restore_median(frame.f->data[i], 1, frame.f->linesize[i], |
avctx->width >> !!i, avctx->height >> !!i, |
c->slices, !i); |
} else { |
restore_median_il(frame.f->data[i], 1, frame.f->linesize[i], |
avctx->width >> !!i, |
avctx->height >> !!i, |
c->slices, !i); |
} |
} |
} |
break; |
case AV_PIX_FMT_YUV422P: |
for (i = 0; i < 3; i++) { |
ret = decode_plane(c, i, frame.f->data[i], 1, frame.f->linesize[i], |
avctx->width >> !!i, avctx->height, |
plane_start[i], c->frame_pred == PRED_LEFT); |
if (ret) |
return ret; |
if (c->frame_pred == PRED_MEDIAN) { |
if (!c->interlaced) { |
restore_median(frame.f->data[i], 1, frame.f->linesize[i], |
avctx->width >> !!i, avctx->height, |
c->slices, 0); |
} else { |
restore_median_il(frame.f->data[i], 1, frame.f->linesize[i], |
avctx->width >> !!i, avctx->height, |
c->slices, 0); |
} |
} |
} |
break; |
} |
|
frame.f->key_frame = 1; |
frame.f->pict_type = AV_PICTURE_TYPE_I; |
frame.f->interlaced_frame = !!c->interlaced; |
|
*got_frame = 1; |
|
/* always report that the buffer was completely consumed */ |
return buf_size; |
} |
|
static av_cold int decode_init(AVCodecContext *avctx) |
{ |
UtvideoContext * const c = avctx->priv_data; |
|
c->avctx = avctx; |
|
ff_dsputil_init(&c->dsp, avctx); |
|
if (avctx->extradata_size < 16) { |
av_log(avctx, AV_LOG_ERROR, |
"Insufficient extradata size %d, should be at least 16\n", |
avctx->extradata_size); |
return AVERROR_INVALIDDATA; |
} |
|
av_log(avctx, AV_LOG_DEBUG, "Encoder version %d.%d.%d.%d\n", |
avctx->extradata[3], avctx->extradata[2], |
avctx->extradata[1], avctx->extradata[0]); |
av_log(avctx, AV_LOG_DEBUG, "Original format %X\n", |
AV_RB32(avctx->extradata + 4)); |
c->frame_info_size = AV_RL32(avctx->extradata + 8); |
c->flags = AV_RL32(avctx->extradata + 12); |
|
if (c->frame_info_size != 4) |
avpriv_request_sample(avctx, "Frame info not 4 bytes"); |
av_log(avctx, AV_LOG_DEBUG, "Encoding parameters %08X\n", c->flags); |
c->slices = (c->flags >> 24) + 1; |
c->compression = c->flags & 1; |
c->interlaced = c->flags & 0x800; |
|
c->slice_bits_size = 0; |
|
switch (avctx->codec_tag) { |
case MKTAG('U', 'L', 'R', 'G'): |
c->planes = 3; |
avctx->pix_fmt = AV_PIX_FMT_RGB24; |
break; |
case MKTAG('U', 'L', 'R', 'A'): |
c->planes = 4; |
avctx->pix_fmt = AV_PIX_FMT_RGBA; |
break; |
case MKTAG('U', 'L', 'Y', '0'): |
c->planes = 3; |
avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
avctx->colorspace = AVCOL_SPC_BT470BG; |
break; |
case MKTAG('U', 'L', 'Y', '2'): |
c->planes = 3; |
avctx->pix_fmt = AV_PIX_FMT_YUV422P; |
avctx->colorspace = AVCOL_SPC_BT470BG; |
break; |
case MKTAG('U', 'L', 'H', '0'): |
c->planes = 3; |
avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
avctx->colorspace = AVCOL_SPC_BT709; |
break; |
case MKTAG('U', 'L', 'H', '2'): |
c->planes = 3; |
avctx->pix_fmt = AV_PIX_FMT_YUV422P; |
avctx->colorspace = AVCOL_SPC_BT709; |
break; |
default: |
av_log(avctx, AV_LOG_ERROR, "Unknown Ut Video FOURCC provided (%08X)\n", |
avctx->codec_tag); |
return AVERROR_INVALIDDATA; |
} |
|
return 0; |
} |
|
static av_cold int decode_end(AVCodecContext *avctx) |
{ |
UtvideoContext * const c = avctx->priv_data; |
|
av_freep(&c->slice_bits); |
|
return 0; |
} |
|
AVCodec ff_utvideo_decoder = { |
.name = "utvideo", |
.long_name = NULL_IF_CONFIG_SMALL("Ut Video"), |
.type = AVMEDIA_TYPE_VIDEO, |
.id = AV_CODEC_ID_UTVIDEO, |
.priv_data_size = sizeof(UtvideoContext), |
.init = decode_init, |
.close = decode_end, |
.decode = decode_frame, |
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS, |
}; |