Commit 591766a3 authored by Mans Rullgard's avatar Mans Rullgard
Browse files

eamad: remove use of MpegEncContext



There is no sense in pulling in this monster struct just for
a handful of fields.  The code does not call any functions
expecting an MpegEncContext.
Signed-off-by: default avatarMans Rullgard <mans@mansr.com>
parent 87cf481a
......@@ -42,12 +42,18 @@
#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];
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)
......@@ -59,14 +65,13 @@ static void bswap16_buf(uint16_t *dst, const uint16_t *src, int count)
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;
ff_dsputil_init(&s->dsp, avctx);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
ff_mpeg12_init_vlcs();
return 0;
}
......@@ -83,13 +88,12 @@ static inline void comp(unsigned char *dst, int dst_stride,
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],
......@@ -100,26 +104,24 @@ static inline void comp_block(MadContext *t, int mb_x, int mb_y,
static inline void idct_put(MadContext *t, DCTELEM *block, int mb_x, int mb_y, int j)
{
MpegEncContext *s = &t->s;
if (j < 4) {
s->dsp.idct_put(
t->dsp.idct_put(
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(
t->dsp.idct_put(
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, DCTELEM * 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];
......@@ -184,9 +186,8 @@ static int decode_motion(GetBitContext *gb)
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;
......@@ -205,28 +206,27 @@ static void decode_mb(MadContext *t, int inter)
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;
s->quant_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;
s->quant_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];
s->quant_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[i] = (ff_mpeg1_default_intra_matrix[i]*qscale) << 1;
}
}
......@@ -237,8 +237,8 @@ static int decode_frame(AVCodecContext *avctx,
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;
......@@ -255,42 +255,42 @@ static int decode_frame(AVCodecContext *avctx,
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 (av_image_check_size(s->width, s->height, 0, avctx) < 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 (avctx->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_malloc(&s->bitstream_buf, &s->bitstream_buf_size, (buf_end-buf) + FF_INPUT_BUFFER_PADDING_SIZE);
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));
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;
*(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;
}
......
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