* DV encoder
* Copyright (c) 2003 Roman Shaposhnik.
*
+ * 50 Mbps (DVCPRO50) support
+ * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
+ *
* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
* of DV technical info.
*
void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block);
} DVVideoContext;
-/* MultiThreading - applies to entire DV codec, not just the avcontext */
-uint8_t** dv_anchor;
+/* MultiThreading - dv_anchor applies to entire DV codec, not just the avcontext */
+/* one element is needed for each video segment in a DV frame */
+/* at most there are 2 DIF channels * 12 DIF sequences * 27 video segments (PAL 50Mbps) */
+#define DV_ANCHOR_SIZE (2*12*27)
+
+static void* dv_anchor[DV_ANCHOR_SIZE];
#define TEX_VLC_BITS 9
return -ENOMEM;
/* dv_anchor lets each thread know its Id */
- dv_anchor = av_malloc(12*27*sizeof(void*));
- if (!dv_anchor) {
- return -ENOMEM;
- }
- for (i=0; i<12*27; i++)
+ for (i=0; i<DV_ANCHOR_SIZE; i++)
dv_anchor[i] = (void*)(size_t)i;
/* it's faster to include sign bit in a generic VLC parsing scheme */
/* XXX: do it only for constant case */
dv_build_unquantize_tables(s, dsp.idct_permutation);
- /* FIXME: I really don't think this should be here */
- if (dv_codec_profile(avctx))
- avctx->pix_fmt = dv_codec_profile(avctx)->pix_fmt;
avctx->coded_frame = &s->picture;
s->avctx= avctx;
typedef struct BlockInfo {
const uint8_t *shift_table;
const uint8_t *scan_table;
+ const int *iweight_table;
uint8_t pos; /* position in block */
uint8_t dct_mode;
uint8_t partial_bit_count;
int last_index = get_bits_size(gb);
const uint8_t *scan_table = mb->scan_table;
const uint8_t *shift_table = mb->shift_table;
+ const int *iweight_table = mb->iweight_table;
int pos = mb->pos;
int partial_bit_count = mb->partial_bit_count;
int level, pos1, run, vlc_len, index;
if (pos >= 64)
break;
- assert(level);
pos1 = scan_table[pos];
- block[pos1] = level << shift_table[pos1];
+ level <<= shift_table[pos1];
+
+ /* unweigh, round, and shift down */
+ level = (level*iweight_table[pos] + (1 << (dv_iweight_bits-1))) >> dv_iweight_bits;
+
+ block[pos1] = level;
UPDATE_CACHE(re, gb);
}
dct_mode = get_bits1(&gb);
mb->dct_mode = dct_mode;
mb->scan_table = s->dv_zigzag[dct_mode];
+ mb->iweight_table = dct_mode ? dv_iweight_248 : dv_iweight_88;
class1 = get_bits(&gb, 2);
mb->shift_table = s->dv_idct_shift[class1 == 3][dct_mode]
[quant + dv_quant_offset[class1]];
v = *mb_pos_ptr++;
mb_x = v & 0xff;
mb_y = v >> 8;
- y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x)<<log2_blocksize);
- if (s->sys->pix_fmt == PIX_FMT_YUV411P)
+ if (s->sys->pix_fmt == PIX_FMT_YUV422P) {
+ y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + (mb_x>>1))<<log2_blocksize);
c_offset = ((mb_y * s->picture.linesize[1] + (mb_x >> 2))<<log2_blocksize);
- else
- c_offset = (((mb_y >> 1) * s->picture.linesize[1] + (mb_x >> 1))<<log2_blocksize);
+ } else { /* 4:1:1 or 4:2:0 */
+ y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x)<<log2_blocksize);
+ if (s->sys->pix_fmt == PIX_FMT_YUV411P)
+ c_offset = ((mb_y * s->picture.linesize[1] + (mb_x >> 2))<<log2_blocksize);
+ else /* 4:2:0 */
+ c_offset = (((mb_y >> 1) * s->picture.linesize[1] + (mb_x >> 1))<<log2_blocksize);
+ }
for(j = 0;j < 6; j++) {
idct_put = s->idct_put[mb->dct_mode && log2_blocksize==3];
- if (j < 4) {
- if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
- /* NOTE: at end of line, the macroblock is handled as 420 */
- idct_put(y_ptr + (j<<log2_blocksize), s->picture.linesize[0], block);
- } else {
- idct_put(y_ptr + (((j & 1) + (j >> 1) * s->picture.linesize[0])<<log2_blocksize),
+ if (s->sys->pix_fmt == PIX_FMT_YUV422P) { /* 4:2:2 */
+ if (j == 0 || j == 2) {
+ /* Y0 Y1 */
+ idct_put(y_ptr + ((j >> 1)<<log2_blocksize),
s->picture.linesize[0], block);
+ } else if(j > 3) {
+ /* Cr Cb */
+ idct_put(s->picture.data[6 - j] + c_offset,
+ s->picture.linesize[6 - j], block);
}
- } else {
- if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
- uint64_t aligned_pixels[64/8];
- uint8_t *pixels= (uint8_t*)aligned_pixels;
- uint8_t *c_ptr, *c_ptr1, *ptr, *ptr1;
- int x, y, linesize;
- /* NOTE: at end of line, the macroblock is handled as 420 */
- idct_put(pixels, 8, block);
- linesize = s->picture.linesize[6 - j];
- c_ptr = s->picture.data[6 - j] + c_offset;
- ptr = pixels;
- for(y = 0;y < (1<<log2_blocksize); y++) {
- ptr1= ptr + (1<<(log2_blocksize-1));
- c_ptr1 = c_ptr + (linesize<<log2_blocksize);
- for(x=0; x < (1<<(log2_blocksize-1)); x++){
- c_ptr[x]= ptr[x]; c_ptr1[x]= ptr1[x];
- }
- c_ptr += linesize;
- ptr += 8;
+ /* note: j=1 and j=3 are "dummy" blocks in 4:2:2 */
+ } else { /* 4:1:1 or 4:2:0 */
+ if (j < 4) {
+ if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
+ /* NOTE: at end of line, the macroblock is handled as 420 */
+ idct_put(y_ptr + (j<<log2_blocksize), s->picture.linesize[0], block);
+ } else {
+ idct_put(y_ptr + (((j & 1) + (j >> 1) * s->picture.linesize[0])<<log2_blocksize),
+ s->picture.linesize[0], block);
}
} else {
- /* don't ask me why they inverted Cb and Cr ! */
- idct_put(s->picture.data[6 - j] + c_offset,
- s->picture.linesize[6 - j], block);
+ if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
+ uint64_t aligned_pixels[64/8];
+ uint8_t *pixels= (uint8_t*)aligned_pixels;
+ uint8_t *c_ptr, *c_ptr1, *ptr, *ptr1;
+ int x, y, linesize;
+ /* NOTE: at end of line, the macroblock is handled as 420 */
+ idct_put(pixels, 8, block);
+ linesize = s->picture.linesize[6 - j];
+ c_ptr = s->picture.data[6 - j] + c_offset;
+ ptr = pixels;
+ for(y = 0;y < (1<<log2_blocksize); y++) {
+ ptr1= ptr + (1<<(log2_blocksize-1));
+ c_ptr1 = c_ptr + (linesize<<log2_blocksize);
+ for(x=0; x < (1<<(log2_blocksize-1)); x++){
+ c_ptr[x]= ptr[x]; c_ptr1[x]= ptr1[x];
+ }
+ c_ptr += linesize;
+ ptr += 8;
+ }
+ } else {
+ /* don't ask me why they inverted Cb and Cr ! */
+ idct_put(s->picture.data[6 - j] + c_offset,
+ s->picture.linesize[6 - j], block);
+ }
}
}
block += 64;
}
static always_inline void dv_set_class_number(DCTELEM* blk, EncBlockInfo* bi,
- const uint8_t* zigzag_scan, int bias)
+ const uint8_t* zigzag_scan, const int *weight, int bias)
{
int i, area;
+ /* We offer two different methods for class number assignment: the
+ method suggested in SMPTE 314M Table 22, and an improved
+ method. The SMPTE method is very conservative; it assigns class
+ 3 (i.e. severe quantization) to any block where the largest AC
+ component is greater than 36. ffmpeg's DV encoder tracks AC bit
+ consumption precisely, so there is no need to bias most blocks
+ towards strongly lossy compression. Instead, we assign class 2
+ to most blocks, and use class 3 only when strictly necessary
+ (for blocks whose largest AC component exceeds 255). */
+
+#if 0 /* SMPTE spec method */
static const int classes[] = {12, 24, 36, 0xffff};
- int max=12;
+#else /* improved ffmpeg method */
+ static const int classes[] = {-1, -1, 255, 0xffff};
+#endif
+ int max=classes[0];
int prev=0;
bi->mb[0] = blk[0];
if (level+15 > 30U) {
bi->sign[i] = (level>>31)&1;
- bi->mb[i] = level= ABS(level)>>4;
+ /* weigh it and and shift down into range, adding for rounding */
+ /* the extra division by a factor of 2^4 reverses the 8x expansion of the DCT
+ AND the 2x doubling of the weights */
+ level = (ABS(level) * weight[i] + (1<<(dv_weight_bits+3))) >> (dv_weight_bits+4);
+ bi->mb[i] = level;
if(level>max) max= level;
bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level);
bi->next[prev]= i;
int i, j, k, a, prev, a2;
EncBlockInfo* b;
- size[4]= 1<<24;
+ size[0] = size[1] = size[2] = size[3] = size[4] = 1<<24;
do {
b = blks;
for (i=0; i<5; i++) {
b->bit_size[a] = 1; // 4 areas 4 bits for EOB :)
b->area_q[a]++;
prev= b->prev[a];
+ assert(b->next[prev] >= mb_area_start[a+1] || b->mb[prev]);
for (k= b->next[prev] ; k<mb_area_start[a+1]; k= b->next[k]) {
b->mb[k] >>= 1;
if (b->mb[k]) {
prev= k;
} else {
if(b->next[k] >= mb_area_start[a+1] && b->next[k]<64){
- for(a2=a+1; b->next[k] >= mb_area_start[a2+1]; a2++);
+ for(a2=a+1; b->next[k] >= mb_area_start[a2+1]; a2++)
+ b->prev[a2] = prev;
assert(a2<4);
assert(b->mb[b->next[k]]);
b->bit_size[a2] += dv_rl2vlc_size(b->next[k] - prev - 1, b->mb[b->next[k]])
-dv_rl2vlc_size(b->next[k] - k - 1, b->mb[b->next[k]]);
+ assert(b->prev[a2]==k && (a2+1 >= 4 || b->prev[a2+1]!=k));
+ b->prev[a2] = prev;
}
b->next[prev] = b->next[k];
}
for(a=2; a==2 || vs_total_ac_bits < size[0]; a+=a){
b = blks;
- size[0] = 0;
+ size[0] = 5*6*4; //EOB
for (j=0; j<6*5; j++, b++) {
prev= b->prev[0];
for (k= b->next[prev]; k<64; k= b->next[k]) {
}
}
-/*
- * This is a very rough initial implementaion. The performance is
- * 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(DVVideoContext *s,
uint8_t *dif,
const uint16_t *mb_pos_ptr)
v = *mb_pos_ptr++;
mb_x = v & 0xff;
mb_y = v >> 8;
- y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 8);
- c_offset = (s->sys->pix_fmt == PIX_FMT_YUV411P) ?
- ((mb_y * s->picture.linesize[1] * 8) + ((mb_x >> 2) * 8)) :
- (((mb_y >> 1) * s->picture.linesize[1] * 8) + ((mb_x >> 1) * 8));
+ if (s->sys->pix_fmt == PIX_FMT_YUV422P) {
+ y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 4);
+ } else { /* 4:1:1 */
+ y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 8);
+ }
+ if (s->sys->pix_fmt == PIX_FMT_YUV420P) {
+ c_offset = (((mb_y >> 1) * s->picture.linesize[1] * 8) + ((mb_x >> 1) * 8));
+ } else { /* 4:2:2 or 4:1:1 */
+ c_offset = ((mb_y * s->picture.linesize[1] * 8) + ((mb_x >> 2) * 8));
+ }
do_edge_wrap = 0;
qnos[mb_index] = 15; /* No quantization */
ptr = dif + mb_index*80 + 4;
for(j = 0;j < 6; j++) {
- if (j < 4) { /* Four Y blocks */
- /* NOTE: at end of line, the macroblock is handled as 420 */
- if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
- data = y_ptr + (j * 8);
+ int dummy = 0;
+ if (s->sys->pix_fmt == PIX_FMT_YUV422P) { /* 4:2:2 */
+ if (j == 0 || j == 2) {
+ /* Y0 Y1 */
+ data = y_ptr + ((j>>1) * 8);
+ linesize = s->picture.linesize[0];
+ } else if (j > 3) {
+ /* Cr Cb */
+ data = s->picture.data[6 - j] + c_offset;
+ linesize = s->picture.linesize[6 - j];
} else {
- data = y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]);
+ /* j=1 and j=3 are "dummy" blocks, used for AC data only */
+ data = 0;
+ linesize = 0;
+ dummy = 1;
+ }
+ } else { /* 4:1:1 or 4:2:0 */
+ if (j < 4) { /* Four Y blocks */
+ /* NOTE: at end of line, the macroblock is handled as 420 */
+ if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
+ data = y_ptr + (j * 8);
+ } else {
+ data = y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]);
+ }
+ linesize = s->picture.linesize[0];
+ } else { /* Cr and Cb blocks */
+ /* don't ask Fabrice why they inverted Cb and Cr ! */
+ data = s->picture.data[6 - j] + c_offset;
+ linesize = s->picture.linesize[6 - j];
+ if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8))
+ do_edge_wrap = 1;
}
- linesize = s->picture.linesize[0];
- } else { /* Cr and Cb blocks */
- /* don't ask Fabrice why they inverted Cb and Cr ! */
- data = s->picture.data[6 - j] + c_offset;
- linesize = s->picture.linesize[6 - j];
- if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8))
- do_edge_wrap = 1;
}
/* Everything is set up -- now just copy data -> DCT block */
b += 8;
}
} else { /* Simple copy: 8x8 -> 8x8 */
- s->get_pixels(block, data, linesize);
+ if (!dummy)
+ s->get_pixels(block, data, linesize);
}
if(s->avctx->flags & CODEC_FLAG_INTERLACED_DCT)
enc_blk->partial_bit_buffer = 0;
enc_blk->cur_ac = 0;
- s->fdct[enc_blk->dct_mode](block);
+ if (dummy) {
+ /* We rely on the fact that encoding all zeros leads to an immediate EOB,
+ which is precisely what the spec calls for in the "dummy" blocks. */
+ memset(block, 0, sizeof(block));
+ } else {
+ s->fdct[enc_blk->dct_mode](block);
+ }
dv_set_class_number(block, enc_blk,
- enc_blk->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct, j/4);
+ enc_blk->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct,
+ enc_blk->dct_mode ? dv_weight_248 : dv_weight_88,
+ j/4);
init_put_bits(pb, ptr, block_sizes[j]/8);
put_bits(pb, 9, (uint16_t)(((enc_blk->mb[0] >> 3) - 1024 + 2) >> 2));
{
DVVideoContext *s = avctx->priv_data;
int slice = (size_t)sl;
- dv_decode_video_segment(s, &s->buf[((slice/27)*6+(slice/3)+slice*5+7)*80],
+
+ /* which DIF channel is this? */
+ int chan = slice / (s->sys->difseg_size * 27);
+
+ /* slice within the DIF channel */
+ int chan_slice = slice % (s->sys->difseg_size * 27);
+
+ /* byte offset of this channel's data */
+ int chan_offset = chan * s->sys->difseg_size * 150 * 80;
+
+ dv_decode_video_segment(s, &s->buf[((chan_slice/27)*6+(chan_slice/3)+chan_slice*5+7)*80 + chan_offset],
&s->sys->video_place[slice*5]);
return 0;
}
{
DVVideoContext *s = avctx->priv_data;
int slice = (size_t)sl;
- dv_encode_video_segment(s, &s->buf[((slice/27)*6+(slice/3)+slice*5+7)*80],
+
+ /* which DIF channel is this? */
+ int chan = slice / (s->sys->difseg_size * 27);
+
+ /* slice within the DIF channel */
+ int chan_slice = slice % (s->sys->difseg_size * 27);
+
+ /* byte offset of this channel's data */
+ int chan_offset = chan * s->sys->difseg_size * 150 * 80;
+
+ dv_encode_video_segment(s, &s->buf[((chan_slice/27)*6+(chan_slice/3)+chan_slice*5+7)*80 + chan_offset],
&s->sys->video_place[slice*5]);
return 0;
}
/* NOTE: exactly one frame must be given (120000 bytes for NTSC,
- 144000 bytes for PAL) */
+ 144000 bytes for PAL - or twice those for 50Mbps) */
static int dvvideo_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
s->buf = buf;
avctx->execute(avctx, dv_decode_mt, (void**)&dv_anchor[0], NULL,
- s->sys->difseg_size * 27);
+ s->sys->n_difchan * s->sys->difseg_size * 27);
emms_c();
s->buf = buf;
c->execute(c, dv_encode_mt, (void**)&dv_anchor[0], NULL,
- s->sys->difseg_size * 27);
+ s->sys->n_difchan * s->sys->difseg_size * 27);
emms_c();
+
+ /* Fill in just enough of the header for dv_frame_profile() to
+ return the correct result, so that the frame can be decoded
+ correctly. The rest of the metadata is filled in by the dvvideo
+ avformat. (this should probably change so that encode_frame()
+ fills in ALL of the metadata - e.g. for Quicktime-wrapped DV
+ streams) */
+
+ /* NTSC/PAL format */
+ buf[3] = s->sys->dsf ? 0x80 : 0x00;
+
+ /* 25Mbps or 50Mbps */
+ buf[80*5 + 48 + 3] = (s->sys->pix_fmt == PIX_FMT_YUV422P) ? 0x4 : 0x0;
+
return s->sys->frame_size;
}
projects / ffmpeg / blobdiff