* 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.
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg 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 this library; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
* @file dv.c
* DV codec.
*/
+#define ALT_BITSTREAM_READER
#include "avcodec.h"
#include "dsputil.h"
-#include "mpegvideo.h"
+#include "bitstream.h"
#include "simple_idct.h"
#include "dvdata.h"
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
#endif
/* XXX: also include quantization */
-static RL_VLC_ELEM *dv_rl_vlc;
+static RL_VLC_ELEM dv_rl_vlc[1184];
/* VLC encoding lookup table */
static struct dv_vlc_pair {
uint32_t vlc;
uint8_t size;
-} (*dv_vlc_map)[DV_VLC_MAP_LEV_SIZE] = NULL;
+} dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE];
static void dv_build_unquantize_tables(DVVideoContext *s, uint8_t* perm)
{
}
}
-static int dvvideo_init(AVCodecContext *avctx)
+static av_cold int dvvideo_init(AVCodecContext *avctx)
{
DVVideoContext *s = avctx->priv_data;
DSPContext dsp;
done = 1;
- dv_vlc_map = av_mallocz_static(DV_VLC_MAP_LEV_SIZE*DV_VLC_MAP_RUN_SIZE*sizeof(struct dv_vlc_pair));
- if (!dv_vlc_map)
- 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 */
to accelerate the parsing of partial codes */
init_vlc(&dv_vlc, TEX_VLC_BITS, j,
new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0);
-
- dv_rl_vlc = av_mallocz_static(dv_vlc.table_size * sizeof(RL_VLC_ELEM));
- if (!dv_rl_vlc)
- return -ENOMEM;
+ assert(dv_vlc.table_size == 1184);
for(i = 0; i < dv_vlc.table_size; i++){
int code= dv_vlc.table[i][0];
/* 248DCT setup */
s->fdct[1] = dsp.fdct248;
- s->idct_put[1] = simple_idct248_put; // FIXME: need to add it to DSP
+ s->idct_put[1] = ff_simple_idct248_put; // FIXME: need to add it to DSP
if(avctx->lowres){
for (i=0; i<64; i++){
int j= ff_zigzag248_direct[i];
/* 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;
/* see dv_88_areas and dv_248_areas for details */
static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
-#ifndef ALT_BITSTREAM_READER
-#warning only works with ALT_BITSTREAM_READER
-static int re_index; //Hack to make it compile
-#endif
-
static inline int get_bits_left(GetBitContext *s)
{
return s->size_in_bits - get_bits_count(s);
}
-static inline int get_bits_size(GetBitContext *s)
-{
- return s->size_in_bits;
-}
-
static inline int put_bits_left(PutBitContext* s)
{
return (s->buf_end - s->buf) * 8 - put_bits_count(s);
/* decode ac coefs */
static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, DCTELEM *block)
{
- int last_index = get_bits_size(gb);
+ int last_index = gb->size_in_bits;
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;
break;
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);
}
/* mb_x and mb_y are in units of 8 pixels */
static inline void dv_decode_video_segment(DVVideoContext *s,
- uint8_t *buf_ptr1,
+ const uint8_t *buf_ptr1,
const uint16_t *mb_pos_ptr)
{
int quant, dc, dct_mode, class1, j;
int c_offset;
uint8_t *y_ptr;
void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block);
- uint8_t *buf_ptr;
+ const uint8_t *buf_ptr;
PutBitContext pb, vs_pb;
GetBitContext gb;
BlockInfo mb_data[5 * 6], *mb, *mb1;
- DECLARE_ALIGNED_8(DCTELEM, sblock[5*6][64]);
+ DECLARE_ALIGNED_16(DCTELEM, sblock[5*6][64]);
DECLARE_ALIGNED_8(uint8_t, mb_bit_buffer[80 + 4]); /* allow some slack */
DECLARE_ALIGNED_8(uint8_t, vs_bit_buffer[5 * 80 + 4]); /* allow some slack */
const int log2_blocksize= 3-s->avctx->lowres;
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;
#ifdef DV_CODEC_TINY_TARGET
/* Converts run and level (where level != 0) pair into vlc, returning bit size */
-static always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc)
+static av_always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc)
{
int size;
if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
return size;
}
-static always_inline int dv_rl2vlc_size(int run, int level)
+static av_always_inline int dv_rl2vlc_size(int run, int level)
{
int size;
return size;
}
#else
-static always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t* vlc)
+static av_always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t* vlc)
{
*vlc = dv_vlc_map[run][l].vlc | sign;
return dv_vlc_map[run][l].size;
}
-static always_inline int dv_rl2vlc_size(int run, int l)
+static av_always_inline int dv_rl2vlc_size(int run, int l)
{
return dv_vlc_map[run][l].size;
}
uint32_t partial_bit_buffer; /* we can't use uint16_t here */
} EncBlockInfo;
-static always_inline PutBitContext* dv_encode_ac(EncBlockInfo* bi, PutBitContext* pb_pool,
+static av_always_inline PutBitContext* dv_encode_ac(EncBlockInfo* bi, PutBitContext* pb_pool,
PutBitContext* pb_end)
{
int prev;
return pb;
}
-static always_inline void dv_set_class_number(DCTELEM* blk, EncBlockInfo* bi,
- const uint8_t* zigzag_scan, int bias)
+static av_always_inline void dv_set_class_number(DCTELEM* blk, EncBlockInfo* bi,
+ 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 = (FFABS(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;
//FIXME replace this by dsputil
#define SC(x, y) ((s[x] - s[y]) ^ ((s[x] - s[y]) >> 7))
-static always_inline int dv_guess_dct_mode(DCTELEM *blk) {
+static av_always_inline int dv_guess_dct_mode(DCTELEM *blk) {
DCTELEM *s;
int score88 = 0;
int score248 = 0;
}
}
-/*
- * 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)
uint8_t* data;
uint8_t* ptr;
int do_edge_wrap;
- DECLARE_ALIGNED_8(DCTELEM, block[64]);
+ DECLARE_ALIGNED_16(DCTELEM, block[64]);
EncBlockInfo enc_blks[5*6];
PutBitContext pbs[5*6];
PutBitContext* pb;
int vs_bit_size = 0;
int qnos[5];
- assert((((int)block) & 7) == 0);
+ assert((((int)block) & 15) == 0);
enc_blk = &enc_blks[0];
pb = &pbs[0];
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;
}
+#ifdef CONFIG_DVVIDEO_ENCODER
static int dv_encode_mt(AVCodecContext *avctx, void* sl)
{
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;
}
+#endif
+#ifdef CONFIG_DECODERS
/* 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)
+ const uint8_t *buf, int buf_size)
{
DVVideoContext *s = avctx->priv_data;
s->picture.key_frame = 1;
s->picture.pict_type = FF_I_TYPE;
avctx->pix_fmt = s->sys->pix_fmt;
+ avctx->time_base = (AVRational){s->sys->frame_rate_base, s->sys->frame_rate};
avcodec_set_dimensions(avctx, s->sys->width, s->sys->height);
if(avctx->get_buffer(avctx, &s->picture) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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();
return s->sys->frame_size;
}
+#endif
+
+
+static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c, uint8_t* buf)
+{
+ /*
+ * Here's what SMPTE314M says about these two:
+ * (page 6) APTn, AP1n, AP2n, AP3n: These data shall be identical
+ * as track application IDs (APTn = 001, AP1n =
+ * 001, AP2n = 001, AP3n = 001), if the source signal
+ * comes from a digital VCR. If the signal source is
+ * unknown, all bits for these data shall be set to 1.
+ * (page 12) STYPE: STYPE defines a signal type of video signal
+ * 00000b = 4:1:1 compression
+ * 00100b = 4:2:2 compression
+ * XXXXXX = Reserved
+ * Now, I've got two problems with these statements:
+ * 1. it looks like APT == 111b should be a safe bet, but it isn't.
+ * It seems that for PAL as defined in IEC 61834 we have to set
+ * APT to 000 and for SMPTE314M to 001.
+ * 2. It is not at all clear what STYPE is used for 4:2:0 PAL
+ * compression scheme (if any).
+ */
+ int apt = (c->sys->pix_fmt == PIX_FMT_YUV420P ? 0 : 1);
+ int stype = (c->sys->pix_fmt == PIX_FMT_YUV422P ? 4 : 0);
+
+ uint8_t aspect = 0;
+ if((int)(av_q2d(c->avctx->sample_aspect_ratio) * c->avctx->width / c->avctx->height * 10) == 17) /* 16:9 */
+ aspect = 0x02;
+
+ buf[0] = (uint8_t)pack_id;
+ switch (pack_id) {
+ case dv_header525: /* I can't imagine why these two weren't defined as real */
+ case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */
+ buf[1] = 0xf8 | /* reserved -- always 1 */
+ (apt & 0x07); /* APT: Track application ID */
+ buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */
+ (0x0f << 3) | /* reserved -- always 1 */
+ (apt & 0x07); /* AP1: Audio application ID */
+ buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */
+ (0x0f << 3) | /* reserved -- always 1 */
+ (apt & 0x07); /* AP2: Video application ID */
+ buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */
+ (0x0f << 3) | /* reserved -- always 1 */
+ (apt & 0x07); /* AP3: Subcode application ID */
+ break;
+ case dv_video_source:
+ buf[1] = 0xff; /* reserved -- always 1 */
+ buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */
+ (1 << 6) | /* following CLF is valid - 0, invalid - 1 */
+ (3 << 4) | /* CLF: color frames id (see ITU-R BT.470-4) */
+ 0xf; /* reserved -- always 1 */
+ buf[3] = (3 << 6) | /* reserved -- always 1 */
+ (c->sys->dsf << 5) | /* system: 60fields/50fields */
+ stype; /* signal type video compression */
+ buf[4] = 0xff; /* VISC: 0xff -- no information */
+ break;
+ case dv_video_control:
+ buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */
+ 0x3f; /* reserved -- always 1 */
+ buf[2] = 0xc8 | /* reserved -- always b11001xxx */
+ aspect;
+ buf[3] = (1 << 7) | /* Frame/field flag 1 -- frame, 0 -- field */
+ (1 << 6) | /* First/second field flag 0 -- field 2, 1 -- field 1 */
+ (1 << 5) | /* Frame change flag 0 -- same picture as before, 1 -- different */
+ (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */
+ 0xc; /* reserved -- always b1100 */
+ buf[4] = 0xff; /* reserved -- always 1 */
+ break;
+ default:
+ buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
+ }
+ return 5;
+}
+
+#ifdef CONFIG_DVVIDEO_ENCODER
+static void dv_format_frame(DVVideoContext* c, uint8_t* buf)
+{
+ int chan, i, j, k;
+
+ for (chan = 0; chan < c->sys->n_difchan; chan++) {
+ for (i = 0; i < c->sys->difseg_size; i++) {
+ memset(buf, 0xff, 80 * 6); /* First 6 DIF blocks are for control data */
+
+ /* DV header: 1DIF */
+ buf += dv_write_dif_id(dv_sect_header, chan, i, 0, buf);
+ buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525), c, buf);
+ buf += 72; /* unused bytes */
+
+ /* DV subcode: 2DIFs */
+ for (j = 0; j < 2; j++) {
+ buf += dv_write_dif_id(dv_sect_subcode, chan, i, j, buf);
+ for (k = 0; k < 6; k++)
+ buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size/2), buf) + 5;
+ buf += 29; /* unused bytes */
+ }
+
+ /* DV VAUX: 3DIFS */
+ for (j = 0; j < 3; j++) {
+ buf += dv_write_dif_id(dv_sect_vaux, chan, i, j, buf);
+ buf += dv_write_pack(dv_video_source, c, buf);
+ buf += dv_write_pack(dv_video_control, c, buf);
+ buf += 7*5;
+ buf += dv_write_pack(dv_video_source, c, buf);
+ buf += dv_write_pack(dv_video_control, c, buf);
+ buf += 4*5 + 2; /* unused bytes */
+ }
+
+ /* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */
+ for (j = 0; j < 135; j++) {
+ if (j%15 == 0) {
+ memset(buf, 0xff, 80);
+ buf += dv_write_dif_id(dv_sect_audio, chan, i, j/15, buf);
+ buf += 77; /* audio control & shuffled PCM audio */
+ }
+ buf += dv_write_dif_id(dv_sect_video, chan, i, j, buf);
+ buf += 77; /* 1 video macro block: 1 bytes control
+ 4 * 14 bytes Y 8x8 data
+ 10 bytes Cr 8x8 data
+ 10 bytes Cb 8x8 data */
+ }
+ }
+ }
+}
+
static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size,
void *data)
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();
+
+ dv_format_frame(s, buf);
+
return s->sys->frame_size;
}
+#endif
static int dvvideo_close(AVCodecContext *c)
{
+ DVVideoContext *s = c->priv_data;
+
+ if(s->picture.data[0])
+ c->release_buffer(c, &s->picture);
return 0;
}
sizeof(DVVideoContext),
dvvideo_init,
dvvideo_encode_frame,
- dvvideo_close,
- NULL,
- CODEC_CAP_DR1,
- NULL
+ .pix_fmts = (enum PixelFormat[]) {PIX_FMT_YUV411P, PIX_FMT_YUV422P, PIX_FMT_YUV420P, PIX_FMT_NONE},
+ .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
};
#endif // CONFIG_DVVIDEO_ENCODER
+#ifdef CONFIG_DVVIDEO_DECODER
AVCodec dvvideo_decoder = {
"dvvideo",
CODEC_TYPE_VIDEO,
dvvideo_close,
dvvideo_decode_frame,
CODEC_CAP_DR1,
- NULL
+ NULL,
+ .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
};
+#endif
projects / ffmpeg / blobdiff