* Electronic Arts Madcow Video Decoder
* Copyright (c) 2007-2009 Peter Ross
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Electronic Arts Madcow Video Decoder
- *
by Peter Ross <pross@xvid.org>
+ *
@author Peter Ross <pross@xvid.org>
*
- * Technical details here:
+ * @see technical details at
* http://wiki.multimedia.cx/index.php?title=Electronic_Arts_MAD
*/
#include "avcodec.h"
#include "get_bits.h"
-#include "dsputil.h"
#include "aandcttab.h"
+#include "eaidct.h"
+#include "internal.h"
#include "mpeg12.h"
#include "mpeg12data.h"
+#include "libavutil/imgutils.h"
#define EA_PREAMBLE_SIZE 8
#define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD i-frame */
#define MADe_TAG MKTAG('M', 'A', 'D', 'e') /* MAD lqp-frame */
typedef struct MadContext {
- MpegEncContext s;
+ AVCodecContext *avctx;
+ DSPContext dsp;
AVFrame frame;
AVFrame last_frame;
+ GetBitContext gb;
void *bitstream_buf;
unsigned int bitstream_buf_size;
- DECLARE_ALIGNED(16, DCTELEM, block)[64];
+ DECLARE_ALIGNED(16, int16_t, block)[64];
+ ScanTable scantable;
+ uint16_t quant_matrix[64];
+ int mb_x;
+ int mb_y;
} MadContext;
-static void bswap16_buf(uint16_t *dst, const uint16_t *src, int count)
-{
- int i;
- for (i=0; i<count; i++)
- dst[i] = av_bswap16(src[i]);
-}
-
static av_cold int decode_init(AVCodecContext *avctx)
{
- MadContext *t = avctx->priv_data;
- MpegEncContext *s = &t->s;
+ MadContext *s = avctx->priv_data;
s->avctx = avctx;
- avctx->pix_fmt = PIX_FMT_YUV420P;
- if (avctx->idct_algo == FF_IDCT_AUTO)
- avctx->idct_algo = FF_IDCT_EA;
- dsputil_init(&s->dsp, avctx);
- ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P;
+ ff_dsputil_init(&s->dsp, avctx);
+ ff_init_scantable_permutation(s->dsp.idct_permutation, FF_NO_IDCT_PERM);
+ ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
ff_mpeg12_init_vlcs();
return 0;
}
static inline void comp_block(MadContext *t, int mb_x, int mb_y,
int j, int mv_x, int mv_y, int add)
{
- MpegEncContext *s = &t->s;
if (j < 4) {
comp(t->frame.data[0] + (mb_y*16 + ((j&2)<<2))*t->frame.linesize[0] + mb_x*16 + ((j&1)<<3),
t->frame.linesize[0],
t->last_frame.data[0] + (mb_y*16 + ((j&2)<<2) + mv_y)*t->last_frame.linesize[0] + mb_x*16 + ((j&1)<<3) + mv_x,
t->last_frame.linesize[0], add);
- } else if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
+ } else if (!(t->avctx->flags & CODEC_FLAG_GRAY)) {
int index = j - 3;
comp(t->frame.data[index] + (mb_y*8)*t->frame.linesize[index] + mb_x * 8,
t->frame.linesize[index],
}
}
-static inline void idct_put(MadContext *t, DCTELEM *block, int mb_x, int mb_y, int j)
+static inline void idct_put(MadContext *t, int16_t *block, int mb_x, int mb_y, int j)
{
- MpegEncContext *s = &t->s;
if (j < 4) {
- s->dsp.idct_put(
+ ff_ea_idct_put_c(
t->frame.data[0] + (mb_y*16 + ((j&2)<<2))*t->frame.linesize[0] + mb_x*16 + ((j&1)<<3),
t->frame.linesize[0], block);
- } else if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
+ } else if (!(t->avctx->flags & CODEC_FLAG_GRAY)) {
int index = j - 3;
- s->dsp.idct_put(
+ ff_ea_idct_put_c(
t->frame.data[index] + (mb_y*8)*t->frame.linesize[index] + mb_x*8,
t->frame.linesize[index], block);
}
}
-static inline void decode_block_intra(MadContext * t, DCTELEM * block)
+static inline void decode_block_intra(MadContext *s, int16_t * block)
{
- MpegEncContext *s = &t->s;
int level, i, j, run;
RLTable *rl = &ff_rl_mpeg1;
- const uint8_t *scantable = s->intra_scantable.permutated;
- int16_t *quant_matrix = s->intra_matrix;
+ const uint8_t *scantable = s->scantable.permutated;
+ int16_t *quant_matrix = s->quant_matrix;
block[0] = (128 + get_sbits(&s->gb, 8)) * quant_matrix[0];
return value;
}
-static void decode_mb(MadContext *t, int inter)
+static void decode_mb(MadContext *s, int inter)
{
- MpegEncContext *s = &t->s;
int mv_map = 0;
int mv_x, mv_y;
int j;
for (j=0; j<6; j++) {
if (mv_map & (1<<j)) { // mv_x and mv_y are guarded by mv_map
int add = 2*decode_motion(&s->gb);
- comp_block(t, s->mb_x, s->mb_y, j, mv_x, mv_y, add);
+ comp_block(s, s->mb_x, s->mb_y, j, mv_x, mv_y, add);
} else {
- s->dsp.clear_block(t->block);
- decode_block_intra(t, t->block);
- idct_put(t, t->block, s->mb_x, s->mb_y, j);
+ s->dsp.clear_block(s->block);
+ decode_block_intra(s, s->block);
+ idct_put(s, s->block, s->mb_x, s->mb_y, j);
}
}
}
-static void calc_intra_matrix(MadContext *t, int qscale)
+static void calc_quant_matrix(MadContext *s, int qscale)
{
- MpegEncContext *s = &t->s;
int i;
- if (s->avctx->idct_algo == FF_IDCT_EA) {
- s->intra_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0]) >> 11;
- for (i=1; i<64; i++)
- s->intra_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32) >> 10;
- } else {
- s->intra_matrix[0] = ff_mpeg1_default_intra_matrix[0];
- for (i=1; i<64; i++)
- s->intra_matrix[i] = (ff_mpeg1_default_intra_matrix[i]*qscale) << 1;
- }
+ s->quant_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0]) >> 11;
+ for (i=1; i<64; i++)
+ s->quant_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32) >> 10;
}
static int decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
+ void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
const uint8_t *buf_end = buf+buf_size;
- MadContext *t = avctx->priv_data;
- MpegEncContext *s = &t->s;
+ MadContext *s = avctx->priv_data;
+ int width, height;
int chunk_type;
int inter;
if (buf_size < 17) {
av_log(avctx, AV_LOG_ERROR, "Input buffer too small\n");
- *data_size = 0;
+ *got_frame = 0;
return -1;
}
av_reduce(&avctx->time_base.num, &avctx->time_base.den,
AV_RL16(&buf[6]), 1000, 1<<30);
- s->width = AV_RL16(&buf[8]);
- s->height = AV_RL16(&buf[10]);
- calc_intra_matrix(t, buf[13]);
+ width = AV_RL16(&buf[8]);
+ height = AV_RL16(&buf[10]);
+ calc_quant_matrix(s, buf[13]);
buf += 16;
- if (avctx->width != s->width || avctx->height != s->height) {
- if (avcodec_check_dimensions(avctx, s->width, s->height) < 0)
+ if (avctx->width != width || avctx->height != height) {
+ if (av_image_check_size(width, height, 0, avctx) < 0)
return -1;
- avcodec_set_dimensions(avctx, s->width, s->height);
- if (t->frame.data[0])
- avctx->release_buffer(avctx, &t->frame);
+ avcodec_set_dimensions(avctx, width, height);
+ if (s->frame.data[0])
+ avctx->release_buffer(avctx, &s->frame);
}
- t->frame.reference = 1;
- if (!t->frame.data[0]) {
- if (avctx->get_buffer(avctx, &t->frame) < 0) {
+ s->frame.reference = 1;
+ if (!s->frame.data[0]) {
+ if (ff_get_buffer(avctx, &s->frame) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
}
- av_fast_malloc(&t->bitstream_buf, &t->bitstream_buf_size, (buf_end-buf) + FF_INPUT_BUFFER_PADDING_SIZE);
- if (!t->bitstream_buf)
+ av_fast_padded_malloc(&s->bitstream_buf, &s->bitstream_buf_size,
+ buf_end - buf);
+ if (!s->bitstream_buf)
return AVERROR(ENOMEM);
- bswap16_buf(t->bitstream_buf, (const uint16_t*)buf, (buf_end-buf)/2);
- init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf));
+ s->dsp.bswap16_buf(s->bitstream_buf, (const uint16_t*)buf, (buf_end-buf)/2);
+ init_get_bits(&s->gb, s->bitstream_buf, 8*(buf_end-buf));
for (s->mb_y=0; s->mb_y < (avctx->height+15)/16; s->mb_y++)
for (s->mb_x=0; s->mb_x < (avctx->width +15)/16; s->mb_x++)
- decode_mb(t, inter);
+ decode_mb(s, inter);
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = t->frame;
+ *got_frame = 1;
+ *(AVFrame*)data = s->frame;
if (chunk_type != MADe_TAG)
- FFSWAP(AVFrame, t->frame, t->last_frame);
+ FFSWAP(AVFrame, s->frame, s->last_frame);
return buf_size;
}
return 0;
}
-AVCodec eamad_decoder = {
- "eamad",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_MAD,
- sizeof(MadContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts Madcow Video")
+AVCodec ff_eamad_decoder = {
+ .name = "eamad",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_MAD,
+ .priv_data_size = sizeof(MadContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts Madcow Video")
};
projects / ffmpeg / blobdiff