*/
#include "avcodec.h"
+#include "blockdsp.h"
+#include "bytestream.h"
+#include "bswapdsp.h"
#include "get_bits.h"
-#include "dsputil.h"
#include "aandcttab.h"
#include "eaidct.h"
-#include "mpeg12.h"
+#include "idctdsp.h"
+#include "internal.h"
#include "mpeg12data.h"
-#include "libavutil/imgutils.h"
+#include "mpeg12vlc.h"
#define EA_PREAMBLE_SIZE 8
-#define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD i-frame */
-#define MADm_TAG MKTAG('M', 'A', 'D', 'm') /* MAD p-frame */
+#define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD I-frame */
+#define MADm_TAG MKTAG('M', 'A', 'D', 'm') /* MAD P-frame */
#define MADe_TAG MKTAG('M', 'A', 'D', 'e') /* MAD lqp-frame */
typedef struct MadContext {
AVCodecContext *avctx;
- DSPContext dsp;
- AVFrame frame;
- AVFrame last_frame;
+ BlockDSPContext bdsp;
+ BswapDSPContext bbdsp;
+ IDCTDSPContext idsp;
+ 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;
{
MadContext *s = avctx->priv_data;
s->avctx = avctx;
- avctx->pix_fmt = 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);
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P;
+ ff_blockdsp_init(&s->bdsp, avctx);
+ ff_bswapdsp_init(&s->bbdsp);
+ ff_idctdsp_init(&s->idsp, avctx);
+ ff_init_scantable_permutation(s->idsp.idct_permutation, FF_IDCT_PERM_NONE);
+ ff_init_scantable(s->idsp.idct_permutation, &s->scantable, ff_zigzag_direct);
ff_mpeg12_init_vlcs();
+
+ s->last_frame = av_frame_alloc();
+ if (!s->last_frame)
+ return AVERROR(ENOMEM);
+
return 0;
}
dst[j*dst_stride + i] = av_clip_uint8(src[j*src_stride + i] + add);
}
-static inline void comp_block(MadContext *t, int mb_x, int mb_y,
+static inline void comp_block(MadContext *t, AVFrame *frame,
+ int mb_x, int mb_y,
int j, int mv_x, int mv_y, int add)
{
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 (!(t->avctx->flags & CODEC_FLAG_GRAY)) {
+ comp(frame->data[0] + (mb_y*16 + ((j&2)<<2))*frame->linesize[0] + mb_x*16 + ((j&1)<<3),
+ 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 (!(t->avctx->flags & AV_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],
- t->last_frame.data[index] + (mb_y * 8 + (mv_y/2))*t->last_frame.linesize[index] + mb_x * 8 + (mv_x/2),
- t->last_frame.linesize[index], add);
+ comp(frame->data[index] + (mb_y*8)*frame->linesize[index] + mb_x * 8,
+ frame->linesize[index],
+ t->last_frame->data[index] + (mb_y * 8 + (mv_y/2))*t->last_frame->linesize[index] + mb_x * 8 + (mv_x/2),
+ t->last_frame->linesize[index], add);
}
}
-static inline void idct_put(MadContext *t, DCTELEM *block, int mb_x, int mb_y, int j)
+static inline void idct_put(MadContext *t, AVFrame *frame, int16_t *block,
+ int mb_x, int mb_y, int j)
{
if (j < 4) {
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 (!(t->avctx->flags & CODEC_FLAG_GRAY)) {
+ frame->data[0] + (mb_y*16 + ((j&2)<<2))*frame->linesize[0] + mb_x*16 + ((j&1)<<3),
+ frame->linesize[0], block);
+ } else if (!(t->avctx->flags & AV_CODEC_FLAG_GRAY)) {
int index = j - 3;
ff_ea_idct_put_c(
- t->frame.data[index] + (mb_y*8)*t->frame.linesize[index] + mb_x*8,
- t->frame.linesize[index], block);
+ frame->data[index] + (mb_y*8)*frame->linesize[index] + mb_x*8,
+ frame->linesize[index], block);
}
}
-static inline void decode_block_intra(MadContext *s, DCTELEM * block)
+static inline void decode_block_intra(MadContext *s, int16_t * block)
{
int level, i, j, run;
RLTable *rl = &ff_rl_mpeg1;
break;
} else if (level != 0) {
i += run;
+ if (i > 63) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
+ return;
+ }
j = scantable[i];
level = (level*quant_matrix[j]) >> 4;
level = (level-1)|1;
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
i += run;
+ if (i > 63) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
+ return;
+ }
j = scantable[i];
if (level < 0) {
level = -level;
level = (level-1)|1;
}
}
- if (i > 63) {
- av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return;
- }
block[j] = level;
}
return value;
}
-static void decode_mb(MadContext *s, int inter)
+static void decode_mb(MadContext *s, AVFrame *frame, int inter)
{
int mv_map = 0;
int mv_x, mv_y;
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(s, s->mb_x, s->mb_y, j, mv_x, mv_y, add);
+ comp_block(s, frame, s->mb_x, s->mb_y, j, mv_x, mv_y, add);
} else {
- s->dsp.clear_block(s->block);
+ s->bdsp.clear_block(s->block);
decode_block_intra(s, s->block);
- idct_put(s, s->block, s->mb_x, s->mb_y, j);
+ idct_put(s, frame, s->block, s->mb_x, s->mb_y, j);
}
}
}
}
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 *s = avctx->priv_data;
+ AVFrame *frame = data;
+ GetByteContext gb;
int width, height;
int chunk_type;
- int inter;
+ int inter, ret;
- if (buf_size < 17) {
- av_log(avctx, AV_LOG_ERROR, "Input buffer too small\n");
- *data_size = 0;
- return -1;
- }
+ bytestream2_init(&gb, buf, buf_size);
- chunk_type = AV_RL32(&buf[0]);
+ chunk_type = bytestream2_get_le32(&gb);
inter = (chunk_type == MADm_TAG || chunk_type == MADe_TAG);
- buf += 8;
+ bytestream2_skip(&gb, 10);
- av_reduce(&avctx->time_base.num, &avctx->time_base.den,
- AV_RL16(&buf[6]), 1000, 1<<30);
+ av_reduce(&avctx->framerate.den, &avctx->framerate.num,
+ bytestream2_get_le16(&gb), 1000, 1<<30);
- width = AV_RL16(&buf[8]);
- height = AV_RL16(&buf[10]);
- calc_quant_matrix(s, buf[13]);
- buf += 16;
+ width = bytestream2_get_le16(&gb);
+ height = bytestream2_get_le16(&gb);
+ bytestream2_skip(&gb, 1);
+ calc_quant_matrix(s, bytestream2_get_byte(&gb));
+ bytestream2_skip(&gb, 2);
+
+ if (bytestream2_get_bytes_left(&gb) < 2) {
+ av_log(avctx, AV_LOG_ERROR, "Input data too small\n");
+ return AVERROR_INVALIDDATA;
+ }
if (avctx->width != width || avctx->height != height) {
- if (av_image_check_size(width, height, 0, avctx) < 0)
- return -1;
- avcodec_set_dimensions(avctx, width, height);
- if (s->frame.data[0])
- avctx->release_buffer(avctx, &s->frame);
+ av_frame_unref(s->last_frame);
+ if ((ret = ff_set_dimensions(avctx, width, height)) < 0)
+ return ret;
}
- s->frame.reference = 1;
- if (!s->frame.data[0]) {
- if (avctx->get_buffer(avctx, &s->frame) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
+ if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
}
- av_fast_malloc(&s->bitstream_buf, &s->bitstream_buf_size, (buf_end-buf) + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (inter && !s->last_frame->data[0]) {
+ av_log(avctx, AV_LOG_WARNING, "Missing reference frame.\n");
+ ret = ff_get_buffer(avctx, s->last_frame, AV_GET_BUFFER_FLAG_REF);
+ if (ret < 0)
+ return ret;
+ memset(s->last_frame->data[0], 0, s->last_frame->height *
+ s->last_frame->linesize[0]);
+ memset(s->last_frame->data[1], 0x80, s->last_frame->height / 2 *
+ s->last_frame->linesize[1]);
+ memset(s->last_frame->data[2], 0x80, s->last_frame->height / 2 *
+ s->last_frame->linesize[2]);
+ }
+
+ av_fast_padded_malloc(&s->bitstream_buf, &s->bitstream_buf_size,
+ bytestream2_get_bytes_left(&gb));
if (!s->bitstream_buf)
return AVERROR(ENOMEM);
- 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));
+ s->bbdsp.bswap16_buf(s->bitstream_buf, (const uint16_t *)(buf + bytestream2_tell(&gb)),
+ bytestream2_get_bytes_left(&gb) / 2);
+ init_get_bits(&s->gb, s->bitstream_buf, 8*(bytestream2_get_bytes_left(&gb)));
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(s, inter);
+ decode_mb(s, frame, inter);
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = s->frame;
+ *got_frame = 1;
- if (chunk_type != MADe_TAG)
- FFSWAP(AVFrame, s->frame, s->last_frame);
+ if (chunk_type != MADe_TAG) {
+ av_frame_unref(s->last_frame);
+ if ((ret = av_frame_ref(s->last_frame, frame)) < 0)
+ return ret;
+ }
return buf_size;
}
static av_cold int decode_end(AVCodecContext *avctx)
{
MadContext *t = avctx->priv_data;
- if (t->frame.data[0])
- avctx->release_buffer(avctx, &t->frame);
- if (t->last_frame.data[0])
- avctx->release_buffer(avctx, &t->last_frame);
+ av_frame_free(&t->last_frame);
av_free(t->bitstream_buf);
return 0;
}
AVCodec ff_eamad_decoder = {
.name = "eamad",
+ .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts Madcow Video"),
.type = AVMEDIA_TYPE_VIDEO,
- .id = CODEC_ID_MAD,
+ .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")
+ .capabilities = AV_CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff