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* DV decoding/encoding now supports MultiThreading for up to 324 CPUs ;-)

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Originally committed as revision 2893 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Roman Shaposhnik 2004-03-14 23:45:42 +00:00
parent 380fd6b1b4
commit 6faa4645c5
3 changed files with 105 additions and 92 deletions
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1
libavcodec/allcodecs.c
View file

@ -74,6 +74,7 @@ void avcodec_register_all(void)
register_avcodec(&asv2_encoder);
register_avcodec(&ffv1_encoder);
register_avcodec(&zlib_encoder);
register_avcodec(&dvvideo_encoder);
#endif /* CONFIG_ENCODERS */
register_avcodec(&rawvideo_encoder);
register_avcodec(&rawvideo_decoder);

1
libavcodec/avcodec.h
View file

@ -1669,6 +1669,7 @@ extern AVCodec h263p_encoder;
extern AVCodec flv_encoder;
extern AVCodec rv10_encoder;
extern AVCodec rv20_encoder;
extern AVCodec dvvideo_encoder;
extern AVCodec mjpeg_encoder;
extern AVCodec ljpeg_encoder;
extern AVCodec mpeg4_encoder;

195
libavcodec/dv.c
View file

@ -33,9 +33,10 @@
#include "simple_idct.h"
#include "dvdata.h"
typedef struct DVVideoDecodeContext {
typedef struct DVVideoContext {
const DVprofile* sys;
AVFrame picture;
uint8_t *buf;
uint8_t dv_zigzag[2][64];
uint8_t dv_idct_shift[2][22][64];
@ -43,10 +44,7 @@ typedef struct DVVideoDecodeContext {
void (*get_pixels)(DCTELEM *block, const uint8_t *pixels, int line_size);
void (*fdct[2])(DCTELEM *block);
void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block);
GetBitContext gb;
DCTELEM block[5*6][64] __align8;
} DVVideoDecodeContext;
} DVVideoContext;
#define TEX_VLC_BITS 9
@ -58,6 +56,9 @@ typedef struct DVVideoDecodeContext {
#define DV_VLC_MAP_LEV_SIZE 512
#endif
/* MultiThreading */
static uint8_t** dv_anchor;
/* XXX: also include quantization */
static RL_VLC_ELEM *dv_rl_vlc;
/* VLC encoding lookup table */
@ -66,7 +67,7 @@ static struct dv_vlc_pair {
uint8_t size;
} (*dv_vlc_map)[DV_VLC_MAP_LEV_SIZE] = NULL;
static void dv_build_unquantize_tables(DVVideoDecodeContext *s, uint8_t* perm)
static void dv_build_unquantize_tables(DVVideoContext *s, uint8_t* perm)
{
int i, q, j;
@ -91,7 +92,7 @@ static void dv_build_unquantize_tables(DVVideoDecodeContext *s, uint8_t* perm)
static int dvvideo_init(AVCodecContext *avctx)
{
DVVideoDecodeContext *s = avctx->priv_data;
DVVideoContext *s = avctx->priv_data;
DSPContext dsp;
static int done=0;
int i, j;
@ -106,6 +107,14 @@ static int dvvideo_init(AVCodecContext *avctx)
if (!dv_vlc_map)
return -ENOMEM;
dv_anchor = av_malloc(12*27*sizeof(void*));
if (!dv_anchor) {
av_free(dv_vlc_map);
return -ENOMEM;
}
for (i=0; i<12*27; i++)
(int)dv_anchor[i] = i;
/* NOTE: as a trick, we use the fact the no codes are unused
to accelerate the parsing of partial codes */
init_vlc(&dv_vlc, TEX_VLC_BITS, NB_DV_VLC,
@ -113,6 +122,7 @@ static int dvvideo_init(AVCodecContext *avctx)
dv_rl_vlc = av_malloc(dv_vlc.table_size * sizeof(RL_VLC_ELEM));
if (!dv_rl_vlc) {
av_free(dv_anchor);
av_free(dv_vlc_map);
return -ENOMEM;
}
@ -199,6 +209,12 @@ static int dvvideo_init(AVCodecContext *avctx)
return 0;
}
static int dvvideo_end(AVCodecContext *avctx)
{
avcodec_default_free_buffers(avctx);
return 0;
}
// #define VLC_DEBUG
typedef struct BlockInfo {
@ -225,9 +241,9 @@ static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
#endif
/* decode ac coefs */
static void dv_decode_ac(DVVideoDecodeContext *s, BlockInfo *mb, DCTELEM *block)
static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, DCTELEM *block)
{
int last_index = get_bits_size(&s->gb);
int last_index = get_bits_size(gb);
int last_re_index;
int shift_offset = mb->shift_offset;
const uint8_t *scan_table = mb->scan_table;
@ -240,7 +256,7 @@ static void dv_decode_ac(DVVideoDecodeContext *s, BlockInfo *mb, DCTELEM *block)
int re_index=0;
int re1_index=0;
#endif
OPEN_READER(re, &s->gb);
OPEN_READER(re, gb);
#ifdef VLC_DEBUG
printf("start\n");
@ -256,11 +272,11 @@ static void dv_decode_ac(DVVideoDecodeContext *s, BlockInfo *mb, DCTELEM *block)
/* build the dummy bit buffer */
l = 16 - partial_bit_count;
UPDATE_CACHE(re, &s->gb);
UPDATE_CACHE(re, gb);
#ifdef VLC_DEBUG
printf("show=%04x\n", SHOW_UBITS(re, &s->gb, 16));
printf("show=%04x\n", SHOW_UBITS(re, gb, 16));
#endif
v = (mb->partial_bit_buffer << l) | SHOW_UBITS(re, &s->gb, l);
v = (mb->partial_bit_buffer << l) | SHOW_UBITS(re, gb, l);
buf[0] = v >> 8;
buf[1] = v;
#ifdef VLC_DEBUG
@ -294,34 +310,34 @@ static void dv_decode_ac(DVVideoDecodeContext *s, BlockInfo *mb, DCTELEM *block)
/* by definition, if we can read the vlc, all partial bits
will be read (otherwise we could have read the vlc before) */
mb->partial_bit_count = 0;
UPDATE_CACHE(re, &s->gb);
UPDATE_CACHE(re, gb);
goto handle_vlc;
}
/* get the AC coefficients until last_index is reached */
for(;;) {
UPDATE_CACHE(re, &s->gb);
UPDATE_CACHE(re, gb);
#ifdef VLC_DEBUG
printf("%2d: bits=%04x index=%d\n",
pos, SHOW_UBITS(re, &s->gb, 16), re_index);
pos, SHOW_UBITS(re, gb, 16), re_index);
#endif
last_re_index = re_index;
GET_RL_VLC(level, run, re, &s->gb, dv_rl_vlc,
GET_RL_VLC(level, run, re, gb, dv_rl_vlc,
TEX_VLC_BITS, 2);
handle_vlc:
#ifdef VLC_DEBUG
printf("run=%d level=%d\n", run, level);
#endif
if (level) {
sign = SHOW_SBITS(re, &s->gb, 1);
LAST_SKIP_BITS(re, &s->gb, 1);
sign = SHOW_SBITS(re, gb, 1);
LAST_SKIP_BITS(re, gb, 1);
}
if (re_index > last_index) {
/* should be < 16 bits otherwise a codeword could have been parsed */
re_index = last_re_index;
UPDATE_CACHE(re, &s->gb);
UPDATE_CACHE(re, gb);
mb->partial_bit_count = last_index - re_index;
mb->partial_bit_buffer = SHOW_UBITS(re, &s->gb, mb->partial_bit_count);
mb->partial_bit_buffer = SHOW_UBITS(re, gb, mb->partial_bit_count);
re_index = last_index;
break;
}
@ -338,7 +354,7 @@ static void dv_decode_ac(DVVideoDecodeContext *s, BlockInfo *mb, DCTELEM *block)
// printf("run=%d level=%d shift=%d\n", run, level, shift_table[pos1]);
}
}
CLOSE_READER(re, &s->gb);
CLOSE_READER(re, gb);
mb->pos = pos;
}
@ -355,7 +371,7 @@ static inline void bit_copy(PutBitContext *pb, GetBitContext *gb)
}
/* mb_x and mb_y are in units of 8 pixels */
static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
static inline void dv_decode_video_segment(DVVideoContext *s,
uint8_t *buf_ptr1,
const uint16_t *mb_pos_ptr)
{
@ -364,18 +380,20 @@ static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
DCTELEM *block, *block1;
int c_offset;
uint8_t *y_ptr;
BlockInfo mb_data[5 * 6], *mb, *mb1;
void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block);
uint8_t *buf_ptr;
PutBitContext pb, vs_pb;
GetBitContext gb;
BlockInfo mb_data[5 * 6], *mb, *mb1;
DCTELEM sblock[5*6][64] __align8;
uint8_t mb_bit_buffer[80 + 4]; /* allow some slack */
uint8_t vs_bit_buffer[5 * 80 + 4]; /* allow some slack */
memset(s->block, 0, sizeof(s->block));
memset(sblock, 0, sizeof(sblock));
/* pass 1 : read DC and AC coefficients in blocks */
buf_ptr = buf_ptr1;
block1 = &s->block[0][0];
block1 = &sblock[0][0];
mb1 = mb_data;
init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80);
for(mb_index = 0; mb_index < 5; mb_index++, mb1 += 6, block1 += 6 * 64) {
@ -387,15 +405,15 @@ static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
block = block1;
for(j = 0;j < 6; j++) {
last_index = block_sizes[j];
init_get_bits(&s->gb, buf_ptr, last_index);
init_get_bits(&gb, buf_ptr, last_index);
/* get the dc */
dc = get_bits(&s->gb, 9);
dc = get_bits(&gb, 9);
dc = (dc << (32 - 9)) >> (32 - 9);
dct_mode = get_bits1(&s->gb);
dct_mode = get_bits1(&gb);
mb->dct_mode = dct_mode;
mb->scan_table = s->dv_zigzag[dct_mode];
class1 = get_bits(&s->gb, 2);
class1 = get_bits(&gb, 2);
mb->shift_offset = (class1 == 3);
mb->shift_table = s->dv_idct_shift[dct_mode]
[quant + dv_quant_offset[class1]];
@ -411,12 +429,12 @@ static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
#ifdef VLC_DEBUG
printf("MB block: %d, %d ", mb_index, j);
#endif
dv_decode_ac(s, mb, block);
dv_decode_ac(&gb, mb, block);
/* write the remaining bits in a new buffer only if the
block is finished */
if (mb->pos >= 64)
bit_copy(&pb, &s->gb);
bit_copy(&pb, &gb);
block += 64;
mb++;
@ -428,11 +446,11 @@ static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
#endif
block = block1;
mb = mb1;
init_get_bits(&s->gb, mb_bit_buffer, put_bits_count(&pb));
init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb));
flush_put_bits(&pb);
for(j = 0;j < 6; j++, block += 64, mb++) {
if (mb->pos < 64 && get_bits_left(&s->gb) > 0) {
dv_decode_ac(s, mb, block);
if (mb->pos < 64 && get_bits_left(&gb) > 0) {
dv_decode_ac(&gb, mb, block);
/* if still not finished, no need to parse other blocks */
if (mb->pos < 64)
break;
@ -441,16 +459,16 @@ static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
/* all blocks are finished, so the extra bytes can be used at
the video segment level */
if (j >= 6)
bit_copy(&vs_pb, &s->gb);
bit_copy(&vs_pb, &gb);
}
/* we need a pass other the whole video segment */
#ifdef VLC_DEBUG
printf("***pass 3 size=%d\n", put_bits_count(&vs_pb));
#endif
block = &s->block[0][0];
block = &sblock[0][0];
mb = mb_data;
init_get_bits(&s->gb, vs_bit_buffer, put_bits_count(&vs_pb));
init_get_bits(&gb, vs_bit_buffer, put_bits_count(&vs_pb));
flush_put_bits(&vs_pb);
for(mb_index = 0; mb_index < 5; mb_index++) {
for(j = 0;j < 6; j++) {
@ -458,7 +476,7 @@ static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
#ifdef VLC_DEBUG
printf("start %d:%d\n", mb_index, j);
#endif
dv_decode_ac(s, mb, block);
dv_decode_ac(&gb, mb, block);
}
if (mb->pos >= 64 && mb->pos < 127)
av_log(NULL, AV_LOG_ERROR, "AC EOB marker is absent pos=%d\n", mb->pos);
@ -468,7 +486,7 @@ static inline void dv_decode_video_segment(DVVideoDecodeContext *s,
}
/* compute idct and place blocks */
block = &s->block[0][0];
block = &sblock[0][0];
mb = mb_data;
for(mb_index = 0; mb_index < 5; mb_index++) {
v = *mb_pos_ptr++;
@ -743,7 +761,7 @@ static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos)
* horrible and the weighting is missing. But it's missing from the
* decoding step also -- so at least we're on the same page with decoder ;-)
*/
static inline void dv_encode_video_segment(DVVideoDecodeContext *s,
static inline void dv_encode_video_segment(DVVideoContext *s,
uint8_t *dif,
const uint16_t *mb_pos_ptr)
{
@ -754,6 +772,7 @@ static inline void dv_encode_video_segment(DVVideoDecodeContext *s,
uint8_t* ptr;
int do_edge_wrap;
DCTELEM block[64] __align8;
DCTELEM sblock[5*6][64] __align8;
EncBlockInfo enc_blks[5*6];
PutBitContext pbs[5*6];
PutBitContext* pb;
@ -807,7 +826,7 @@ static inline void dv_encode_video_segment(DVVideoDecodeContext *s,
}
enc_blk->dct_mode = dv_guess_dct_mode(block);
enc_blk->mb = &s->block[mb_index*6+j][0];
enc_blk->mb = &sblock[mb_index*6+j][0];
enc_blk->area_q[0] = enc_blk->area_q[1] = enc_blk->area_q[2] = enc_blk->area_q[3] = 0;
enc_blk->partial_bit_count = 0;
enc_blk->partial_bit_buffer = 0;
@ -859,15 +878,31 @@ static inline void dv_encode_video_segment(DVVideoDecodeContext *s,
flush_put_bits(&pbs[j]);
}
static int dv_decode_mt(AVCodecContext *avctx, void* sl)
{
DVVideoContext *s = avctx->priv_data;
int slice = (int)sl;
dv_decode_video_segment(s, &s->buf[((slice/27)*6+(slice/3)+slice*5+7)*80],
&s->sys->video_place[slice*5]);
return 0;
}
static int dv_encode_mt(AVCodecContext *avctx, void* sl)
{
DVVideoContext *s = avctx->priv_data;
int slice = (int)sl;
dv_encode_video_segment(s, &s->buf[((slice/27)*6+(slice/3)+slice*5+7)*80],
&s->sys->video_place[slice*5]);
return 0;
}
/* NOTE: exactly one frame must be given (120000 bytes for NTSC,
144000 bytes for PAL) */
static int dvvideo_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
DVVideoDecodeContext *s = avctx->priv_data;
int ds, vs;
const uint16_t *mb_pos_ptr;
DVVideoContext *s = avctx->priv_data;
*data_size=0;
/* special case for last picture */
@ -878,7 +913,6 @@ static int dvvideo_decode_frame(AVCodecContext *avctx,
if (!s->sys || buf_size < s->sys->frame_size)
return -1; /* NOTE: we only accept several full frames */
if(s->picture.data[0])
avctx->release_buffer(avctx, &s->picture);
@ -893,24 +927,10 @@ static int dvvideo_decode_frame(AVCodecContext *avctx,
s->picture.interlaced_frame = 1;
s->picture.top_field_first = 0;
/* for each DIF segment */
mb_pos_ptr = s->sys->video_place;
for (ds = 0; ds < s->sys->difseg_size; ds++) {
buf += 6 * 80; /* skip DIF segment header */
for(vs = 0; vs < 27; vs++) {
if ((vs % 3) == 0)
buf += 80; /* skip audio block */
#ifdef VLC_DEBUG
printf("********************* %d, %d **********************\n", ds, vs);
#endif
dv_decode_video_segment(s, buf, mb_pos_ptr);
buf += 5 * 80;
mb_pos_ptr += 5;
}
}
s->buf = buf;
avctx->execute(avctx, dv_decode_mt, (void**)&dv_anchor[0], NULL,
s->sys->difseg_size * 27);
emms_c();
/* return image */
@ -923,9 +943,7 @@ static int dvvideo_decode_frame(AVCodecContext *avctx,
static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size,
void *data)
{
DVVideoDecodeContext *s = c->priv_data;
const uint16_t *mb_pos_ptr;
int ds, vs;
DVVideoContext *s = c->priv_data;
s->sys = dv_codec_profile(c);
if (!s->sys)
@ -934,41 +952,34 @@ static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size,
c->pix_fmt = s->sys->pix_fmt;
s->picture = *((AVFrame *)data);
/* for each DIF segment */
mb_pos_ptr = s->sys->video_place;
for (ds = 0; ds < s->sys->difseg_size; ds++) {
buf += 6 * 80; /* skip DIF segment header */
for(vs = 0; vs < 27; vs++) {
if ((vs % 3) == 0)
buf += 80; /* skip audio block */
#ifdef VLC_DEBUG
printf("********************* %d, %d **********************\n", ds, vs);
#endif
dv_encode_video_segment(s, buf, mb_pos_ptr);
buf += 5 * 80;
mb_pos_ptr += 5;
}
}
s->buf = buf;
c->execute(c, dv_encode_mt, (void**)&dv_anchor[0], NULL,
s->sys->difseg_size * 27);
emms_c();
return s->sys->frame_size;
}
static int dvvideo_end(AVCodecContext *avctx)
{
avcodec_default_free_buffers(avctx);
return 0;
}
AVCodec dvvideo_encoder = {
"dvvideo",
CODEC_TYPE_VIDEO,
CODEC_ID_DVVIDEO,
sizeof(DVVideoContext),
dvvideo_init,
dvvideo_encode_frame,
dvvideo_end,
NULL,
CODEC_CAP_DR1,
NULL
};
AVCodec dvvideo_decoder = {
"dvvideo",
CODEC_TYPE_VIDEO,
CODEC_ID_DVVIDEO,
sizeof(DVVideoDecodeContext),
sizeof(DVVideoContext),
dvvideo_init,
dvvideo_encode_frame,
NULL,
dvvideo_end,
dvvideo_decode_frame,
CODEC_CAP_DR1,