* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
* of DV technical info.
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
* @file
* DV codec.
*/
-#define ALT_BITSTREAM_READER
+
+#include "libavutil/internal.h"
+#include "libavutil/pixdesc.h"
+
#include "avcodec.h"
-#include "dsputil.h"
-#include "get_bits.h"
+#include "dv.h"
+#include "dvdata.h"
+#include "internal.h"
#include "put_bits.h"
#include "simple_idct.h"
-#include "dvdata.h"
-#include "dv_tablegen.h"
-
-//#undef NDEBUG
-//#include <assert.h>
-
-typedef struct DVVideoContext {
- const DVprofile *sys;
- AVFrame picture;
- AVCodecContext *avctx;
- uint8_t *buf;
-
- uint8_t dv_zigzag[2][64];
-
- 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);
- me_cmp_func ildct_cmp;
-} DVVideoContext;
-
-#define TEX_VLC_BITS 9
/* XXX: also include quantization */
-static RL_VLC_ELEM dv_rl_vlc[1184];
+RL_VLC_ELEM ff_dv_rl_vlc[1184];
-static inline int dv_work_pool_size(const DVprofile *d)
+static inline void dv_calc_mb_coordinates(const AVDVProfile *d, int chan,
+ int seq, int slot, uint16_t *tbl)
{
- int size = d->n_difchan*d->difseg_size*27;
- if (DV_PROFILE_IS_1080i50(d))
- size -= 3*27;
- if (DV_PROFILE_IS_720p50(d))
- size -= 4*27;
- return size;
-}
-
-static inline void dv_calc_mb_coordinates(const DVprofile *d, int chan, int seq, int slot,
- uint16_t *tbl)
-{
- static const uint8_t off[] = { 2, 6, 8, 0, 4 };
+ static const uint8_t off[] = { 2, 6, 8, 0, 4 };
static const uint8_t shuf1[] = { 36, 18, 54, 0, 72 };
static const uint8_t shuf2[] = { 24, 12, 36, 0, 48 };
- static const uint8_t shuf3[] = { 18, 9, 27, 0, 36 };
+ static const uint8_t shuf3[] = { 18, 9, 27, 0, 36 };
- static const uint8_t l_start[] = {0, 4, 9, 13, 18, 22, 27, 31, 36, 40};
+ static const uint8_t l_start[] = { 0, 4, 9, 13, 18, 22, 27, 31, 36, 40 };
static const uint8_t l_start_shuffled[] = { 9, 4, 13, 0, 18 };
- static const uint8_t serpent1[] = {0, 1, 2, 2, 1, 0,
- 0, 1, 2, 2, 1, 0,
- 0, 1, 2, 2, 1, 0,
- 0, 1, 2, 2, 1, 0,
- 0, 1, 2};
- static const uint8_t serpent2[] = {0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
- 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
- 0, 1, 2, 3, 4, 5};
-
- static const uint8_t remap[][2] = {{ 0, 0}, { 0, 0}, { 0, 0}, { 0, 0}, /* dummy */
- { 0, 0}, { 0, 1}, { 0, 2}, { 0, 3}, {10, 0},
- {10, 1}, {10, 2}, {10, 3}, {20, 0}, {20, 1},
- {20, 2}, {20, 3}, {30, 0}, {30, 1}, {30, 2},
- {30, 3}, {40, 0}, {40, 1}, {40, 2}, {40, 3},
- {50, 0}, {50, 1}, {50, 2}, {50, 3}, {60, 0},
- {60, 1}, {60, 2}, {60, 3}, {70, 0}, {70, 1},
- {70, 2}, {70, 3}, { 0,64}, { 0,65}, { 0,66},
- {10,64}, {10,65}, {10,66}, {20,64}, {20,65},
- {20,66}, {30,64}, {30,65}, {30,66}, {40,64},
- {40,65}, {40,66}, {50,64}, {50,65}, {50,66},
- {60,64}, {60,65}, {60,66}, {70,64}, {70,65},
- {70,66}, { 0,67}, {20,67}, {40,67}, {60,67}};
+ static const uint8_t serpent1[] = {
+ 0, 1, 2, 2, 1, 0,
+ 0, 1, 2, 2, 1, 0,
+ 0, 1, 2, 2, 1, 0,
+ 0, 1, 2, 2, 1, 0,
+ 0, 1, 2
+ };
+ static const uint8_t serpent2[] = {
+ 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
+ 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
+ 0, 1, 2, 3, 4, 5
+ };
+
+ static const uint8_t remap[][2] = {
+ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, /* dummy */
+ { 0, 0 }, { 0, 1 }, { 0, 2 }, { 0, 3 }, { 10, 0 },
+ { 10, 1 }, { 10, 2 }, { 10, 3 }, { 20, 0 }, { 20, 1 },
+ { 20, 2 }, { 20, 3 }, { 30, 0 }, { 30, 1 }, { 30, 2 },
+ { 30, 3 }, { 40, 0 }, { 40, 1 }, { 40, 2 }, { 40, 3 },
+ { 50, 0 }, { 50, 1 }, { 50, 2 }, { 50, 3 }, { 60, 0 },
+ { 60, 1 }, { 60, 2 }, { 60, 3 }, { 70, 0 }, { 70, 1 },
+ { 70, 2 }, { 70, 3 }, { 0, 64 }, { 0, 65 }, { 0, 66 },
+ { 10, 64 }, { 10, 65 }, { 10, 66 }, { 20, 64 }, { 20, 65 },
+ { 20, 66 }, { 30, 64 }, { 30, 65 }, { 30, 66 }, { 40, 64 },
+ { 40, 65 }, { 40, 66 }, { 50, 64 }, { 50, 65 }, { 50, 66 },
+ { 60, 64 }, { 60, 65 }, { 60, 66 }, { 70, 64 }, { 70, 65 },
+ { 70, 66 }, { 0, 67 }, { 20, 67 }, { 40, 67 }, { 60, 67 }
+ };
int i, k, m;
int x, y, blk;
- for (m=0; m<5; m++) {
- switch (d->width) {
- case 1440:
- blk = (chan*11+seq)*27+slot;
-
- if (chan == 0 && seq == 11) {
- x = m*27+slot;
- if (x<90) {
- y = 0;
- } else {
- x = (x - 90)*2;
- y = 67;
- }
- } else {
- i = (4*chan + blk + off[m])%11;
- k = (blk/11)%27;
+ for (m = 0; m < 5; m++) {
+ switch (d->width) {
+ case 1440:
+ blk = (chan * 11 + seq) * 27 + slot;
+
+ if (chan == 0 && seq == 11) {
+ x = m * 27 + slot;
+ if (x < 90) {
+ y = 0;
+ } else {
+ x = (x - 90) * 2;
+ y = 67;
+ }
+ } else {
+ i = (4 * chan + blk + off[m]) % 11;
+ k = (blk / 11) % 27;
- x = shuf1[m] + (chan&1)*9 + k%9;
- y = (i*3+k/9)*2 + (chan>>1) + 1;
- }
- tbl[m] = (x<<1)|(y<<9);
- break;
- case 1280:
- blk = (chan*10+seq)*27+slot;
+ x = shuf1[m] + (chan & 1) * 9 + k % 9;
+ y = (i * 3 + k / 9) * 2 + (chan >> 1) + 1;
+ }
+ tbl[m] = (x << 1) | (y << 9);
+ break;
+ case 1280:
+ blk = (chan * 10 + seq) * 27 + slot;
- i = (4*chan + (seq/5) + 2*blk + off[m])%10;
- k = (blk/5)%27;
+ i = (4 * chan + (seq / 5) + 2 * blk + off[m]) % 10;
+ k = (blk / 5) % 27;
- x = shuf1[m]+(chan&1)*9 + k%9;
- y = (i*3+k/9)*2 + (chan>>1) + 4;
+ x = shuf1[m] + (chan & 1) * 9 + k % 9;
+ y = (i * 3 + k / 9) * 2 + (chan >> 1) + 4;
- if (x >= 80) {
- x = remap[y][0]+((x-80)<<(y>59));
- y = remap[y][1];
- }
- tbl[m] = (x<<1)|(y<<9);
- break;
- case 960:
- blk = (chan*10+seq)*27+slot;
+ if (x >= 80) {
+ x = remap[y][0] + ((x - 80) << (y > 59));
+ y = remap[y][1];
+ }
+ tbl[m] = (x << 1) | (y << 9);
+ break;
+ case 960:
+ blk = (chan * 10 + seq) * 27 + slot;
- i = (4*chan + (seq/5) + 2*blk + off[m])%10;
- k = (blk/5)%27 + (i&1)*3;
+ i = (4 * chan + (seq / 5) + 2 * blk + off[m]) % 10;
+ k = (blk / 5) % 27 + (i & 1) * 3;
- x = shuf2[m] + k%6 + 6*(chan&1);
- y = l_start[i] + k/6 + 45*(chan>>1);
- tbl[m] = (x<<1)|(y<<9);
- break;
+ x = shuf2[m] + k % 6 + 6 * (chan & 1);
+ y = l_start[i] + k / 6 + 45 * (chan >> 1);
+ tbl[m] = (x << 1) | (y << 9);
+ break;
case 720:
- switch (d->pix_fmt) {
- case PIX_FMT_YUV422P:
- x = shuf3[m] + slot/3;
- y = serpent1[slot] +
- ((((seq + off[m]) % d->difseg_size)<<1) + chan)*3;
- tbl[m] = (x<<1)|(y<<8);
- break;
- case PIX_FMT_YUV420P:
- x = shuf3[m] + slot/3;
- y = serpent1[slot] +
- ((seq + off[m]) % d->difseg_size)*3;
- tbl[m] = (x<<1)|(y<<9);
- break;
- case PIX_FMT_YUV411P:
- i = (seq + off[m]) % d->difseg_size;
- k = slot + ((m==1||m==2)?3:0);
-
- x = l_start_shuffled[m] + k/6;
- y = serpent2[k] + i*6;
- if (x>21)
- y = y*2 - i*6;
- tbl[m] = (x<<2)|(y<<8);
- break;
- }
+ switch (d->pix_fmt) {
+ case AV_PIX_FMT_YUV422P:
+ x = shuf3[m] + slot / 3;
+ y = serpent1[slot] +
+ ((((seq + off[m]) % d->difseg_size) << 1) + chan) * 3;
+ tbl[m] = (x << 1) | (y << 8);
+ break;
+ case AV_PIX_FMT_YUV420P:
+ x = shuf3[m] + slot / 3;
+ y = serpent1[slot] +
+ ((seq + off[m]) % d->difseg_size) * 3;
+ tbl[m] = (x << 1) | (y << 9);
+ break;
+ case AV_PIX_FMT_YUV411P:
+ i = (seq + off[m]) % d->difseg_size;
+ k = slot + ((m == 1 || m == 2) ? 3 : 0);
+
+ x = l_start_shuffled[m] + k / 6;
+ y = serpent2[k] + i * 6;
+ if (x > 21)
+ y = y * 2 - i * 6;
+ tbl[m] = (x << 2) | (y << 8);
+ break;
+ }
default:
- break;
+ break;
}
}
}
-static int dv_init_dynamic_tables(const DVprofile *d)
+/* quantization quanta by QNO for DV100 */
+static const uint8_t dv100_qstep[16] = {
+ 1, /* QNO = 0 and 1 both have no quantization */
+ 1,
+ 2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52
+};
+
+static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 };
+
+int ff_dv_init_dynamic_tables(DVVideoContext *ctx, const AVDVProfile *d)
{
- int j,i,c,s,p;
+ int j, i, c, s, p;
uint32_t *factor1, *factor2;
const int *iweight1, *iweight2;
- if (!d->work_chunks[dv_work_pool_size(d)-1].buf_offset) {
- p = i = 0;
- for (c=0; c<d->n_difchan; c++) {
- for (s=0; s<d->difseg_size; s++) {
- p += 6;
- for (j=0; j<27; j++) {
- p += !(j%3);
- if (!(DV_PROFILE_IS_1080i50(d) && c != 0 && s == 11) &&
- !(DV_PROFILE_IS_720p50(d) && s > 9)) {
- dv_calc_mb_coordinates(d, c, s, j, &d->work_chunks[i].mb_coordinates[0]);
- d->work_chunks[i++].buf_offset = p;
- }
- p += 5;
+ p = i = 0;
+ for (c = 0; c < d->n_difchan; c++) {
+ for (s = 0; s < d->difseg_size; s++) {
+ p += 6;
+ for (j = 0; j < 27; j++) {
+ p += !(j % 3);
+ if (!(DV_PROFILE_IS_1080i50(d) && c != 0 && s == 11) &&
+ !(DV_PROFILE_IS_720p50(d) && s > 9)) {
+ dv_calc_mb_coordinates(d, c, s, j, &ctx->work_chunks[i].mb_coordinates[0]);
+ ctx->work_chunks[i++].buf_offset = p;
}
+ p += 5;
}
}
}
- if (!d->idct_factor[DV_PROFILE_IS_HD(d)?8191:5631]) {
- factor1 = &d->idct_factor[0];
- factor2 = &d->idct_factor[DV_PROFILE_IS_HD(d)?4096:2816];
- if (d->height == 720) {
- iweight1 = &dv_iweight_720_y[0];
- iweight2 = &dv_iweight_720_c[0];
- } else {
- iweight1 = &dv_iweight_1080_y[0];
- iweight2 = &dv_iweight_1080_c[0];
- }
- if (DV_PROFILE_IS_HD(d)) {
- for (c = 0; c < 4; c++) {
- for (s = 0; s < 16; s++) {
- for (i = 0; i < 64; i++) {
- *factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i];
- *factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i];
- }
+ factor1 = &ctx->idct_factor[0];
+ factor2 = &ctx->idct_factor[DV_PROFILE_IS_HD(d) ? 4096 : 2816];
+ if (d->height == 720) {
+ iweight1 = &ff_dv_iweight_720_y[0];
+ iweight2 = &ff_dv_iweight_720_c[0];
+ } else {
+ iweight1 = &ff_dv_iweight_1080_y[0];
+ iweight2 = &ff_dv_iweight_1080_c[0];
+ }
+ if (DV_PROFILE_IS_HD(d)) {
+ for (c = 0; c < 4; c++) {
+ for (s = 0; s < 16; s++) {
+ for (i = 0; i < 64; i++) {
+ *factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i];
+ *factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i];
}
}
- } else {
- iweight1 = &dv_iweight_88[0];
- for (j = 0; j < 2; j++, iweight1 = &dv_iweight_248[0]) {
- for (s = 0; s < 22; s++) {
- for (i = c = 0; c < 4; c++) {
- for (; i < dv_quant_areas[c]; i++) {
- *factor1 = iweight1[i] << (dv_quant_shifts[s][c] + 1);
- *factor2++ = (*factor1++) << 1;
- }
+ }
+ } else {
+ iweight1 = &ff_dv_iweight_88[0];
+ for (j = 0; j < 2; j++, iweight1 = &ff_dv_iweight_248[0]) {
+ for (s = 0; s < 22; s++) {
+ for (i = c = 0; c < 4; c++) {
+ for (; i < dv_quant_areas[c]; i++) {
+ *factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1);
+ *factor2++ = (*factor1++) << 1;
}
}
}
return 0;
}
-static av_cold int dvvideo_init(AVCodecContext *avctx)
+av_cold int ff_dvvideo_init(AVCodecContext *avctx)
{
DVVideoContext *s = avctx->priv_data;
- DSPContext dsp;
static int done = 0;
int i, j;
if (!done) {
VLC dv_vlc;
- uint16_t new_dv_vlc_bits[NB_DV_VLC*2];
- uint8_t new_dv_vlc_len[NB_DV_VLC*2];
- uint8_t new_dv_vlc_run[NB_DV_VLC*2];
- int16_t new_dv_vlc_level[NB_DV_VLC*2];
+ uint16_t new_dv_vlc_bits[NB_DV_VLC * 2];
+ uint8_t new_dv_vlc_len[NB_DV_VLC * 2];
+ uint8_t new_dv_vlc_run[NB_DV_VLC * 2];
+ int16_t new_dv_vlc_level[NB_DV_VLC * 2];
done = 1;
/* it's faster to include sign bit in a generic VLC parsing scheme */
for (i = 0, j = 0; i < NB_DV_VLC; i++, j++) {
- new_dv_vlc_bits[j] = dv_vlc_bits[i];
- new_dv_vlc_len[j] = dv_vlc_len[i];
- new_dv_vlc_run[j] = dv_vlc_run[i];
- new_dv_vlc_level[j] = dv_vlc_level[i];
+ new_dv_vlc_bits[j] = ff_dv_vlc_bits[i];
+ new_dv_vlc_len[j] = ff_dv_vlc_len[i];
+ new_dv_vlc_run[j] = ff_dv_vlc_run[i];
+ new_dv_vlc_level[j] = ff_dv_vlc_level[i];
- if (dv_vlc_level[i]) {
+ if (ff_dv_vlc_level[i]) {
new_dv_vlc_bits[j] <<= 1;
new_dv_vlc_len[j]++;
j++;
- new_dv_vlc_bits[j] = (dv_vlc_bits[i] << 1) | 1;
- new_dv_vlc_len[j] = dv_vlc_len[i] + 1;
- new_dv_vlc_run[j] = dv_vlc_run[i];
- new_dv_vlc_level[j] = -dv_vlc_level[i];
+ new_dv_vlc_bits[j] = (ff_dv_vlc_bits[i] << 1) | 1;
+ new_dv_vlc_len[j] = ff_dv_vlc_len[i] + 1;
+ new_dv_vlc_run[j] = ff_dv_vlc_run[i];
+ new_dv_vlc_level[j] = -ff_dv_vlc_level[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, j,
- new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0);
+ * 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);
assert(dv_vlc.table_size == 1184);
- for (i = 0; i < dv_vlc.table_size; i++){
+ for (i = 0; i < dv_vlc.table_size; i++) {
int code = dv_vlc.table[i][0];
int len = dv_vlc.table[i][1];
int level, run;
- if (len < 0){ //more bits needed
+ if (len < 0) { // more bits needed
run = 0;
level = code;
} else {
- run = new_dv_vlc_run [code] + 1;
+ run = new_dv_vlc_run[code] + 1;
level = new_dv_vlc_level[code];
}
- dv_rl_vlc[i].len = len;
- dv_rl_vlc[i].level = level;
- dv_rl_vlc[i].run = run;
+ ff_dv_rl_vlc[i].len = len;
+ ff_dv_rl_vlc[i].level = level;
+ ff_dv_rl_vlc[i].run = run;
}
- free_vlc(&dv_vlc);
-
- dv_vlc_map_tableinit();
+ ff_free_vlc(&dv_vlc);
}
- /* Generic DSP setup */
- dsputil_init(&dsp, avctx);
- ff_set_cmp(&dsp, dsp.ildct_cmp, avctx->ildct_cmp);
- s->get_pixels = dsp.get_pixels;
- s->ildct_cmp = dsp.ildct_cmp[5];
-
- /* 88DCT setup */
- s->fdct[0] = dsp.fdct;
- s->idct_put[0] = dsp.idct_put;
- for (i = 0; i < 64; i++)
- s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]];
-
- /* 248DCT setup */
- s->fdct[1] = dsp.fdct248;
- 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];
- s->dv_zigzag[1][i] = dsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2];
- }
- }else
- memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64);
-
- avctx->coded_frame = &s->picture;
s->avctx = avctx;
avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
return 0;
}
-
-static av_cold int dvvideo_init_encoder(AVCodecContext *avctx)
-{
- if (!ff_dv_codec_profile(avctx)) {
- av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video\n",
- avctx->width, avctx->height, avcodec_get_pix_fmt_name(avctx->pix_fmt));
- return -1;
- }
-
- return dvvideo_init(avctx);
-}
-
-// #define VLC_DEBUG
-// #define printf(...) av_log(NULL, AV_LOG_ERROR, __VA_ARGS__)
-
-typedef struct BlockInfo {
- const uint32_t *factor_table;
- const uint8_t *scan_table;
- uint8_t pos; /* position in block */
- void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block);
- uint8_t partial_bit_count;
- uint16_t partial_bit_buffer;
- int shift_offset;
-} BlockInfo;
-
-/* bit budget for AC only in 5 MBs */
-static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5;
-/* see dv_88_areas and dv_248_areas for details */
-static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
-
-static inline int put_bits_left(PutBitContext* s)
-{
- return (s->buf_end - s->buf) * 8 - put_bits_count(s);
-}
-
-/* decode ac coefficients */
-static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, DCTELEM *block)
-{
- int last_index = gb->size_in_bits;
- const uint8_t *scan_table = mb->scan_table;
- const uint32_t *factor_table = mb->factor_table;
- int pos = mb->pos;
- int partial_bit_count = mb->partial_bit_count;
- int level, run, vlc_len, index;
-
- OPEN_READER(re, gb);
- UPDATE_CACHE(re, gb);
-
- /* if we must parse a partial vlc, we do it here */
- if (partial_bit_count > 0) {
- re_cache = ((unsigned)re_cache >> partial_bit_count) |
- (mb->partial_bit_buffer << (sizeof(re_cache) * 8 - partial_bit_count));
- re_index -= partial_bit_count;
- mb->partial_bit_count = 0;
- }
-
- /* get the AC coefficients until last_index is reached */
- for (;;) {
-#ifdef VLC_DEBUG
- printf("%2d: bits=%04x index=%d\n", pos, SHOW_UBITS(re, gb, 16), re_index);
-#endif
- /* our own optimized GET_RL_VLC */
- index = NEG_USR32(re_cache, TEX_VLC_BITS);
- vlc_len = dv_rl_vlc[index].len;
- if (vlc_len < 0) {
- index = NEG_USR32((unsigned)re_cache << TEX_VLC_BITS, -vlc_len) + dv_rl_vlc[index].level;
- vlc_len = TEX_VLC_BITS - vlc_len;
- }
- level = dv_rl_vlc[index].level;
- run = dv_rl_vlc[index].run;
-
- /* gotta check if we're still within gb boundaries */
- if (re_index + vlc_len > last_index) {
- /* should be < 16 bits otherwise a codeword could have been parsed */
- mb->partial_bit_count = last_index - re_index;
- mb->partial_bit_buffer = NEG_USR32(re_cache, mb->partial_bit_count);
- re_index = last_index;
- break;
- }
- re_index += vlc_len;
-
-#ifdef VLC_DEBUG
- printf("run=%d level=%d\n", run, level);
-#endif
- pos += run;
- if (pos >= 64)
- break;
-
- level = (level * factor_table[pos] + (1 << (dv_iweight_bits - 1))) >> dv_iweight_bits;
- block[scan_table[pos]] = level;
-
- UPDATE_CACHE(re, gb);
- }
- CLOSE_READER(re, gb);
- mb->pos = pos;
-}
-
-static inline void bit_copy(PutBitContext *pb, GetBitContext *gb)
-{
- int bits_left = get_bits_left(gb);
- while (bits_left >= MIN_CACHE_BITS) {
- put_bits(pb, MIN_CACHE_BITS, get_bits(gb, MIN_CACHE_BITS));
- bits_left -= MIN_CACHE_BITS;
- }
- if (bits_left > 0) {
- put_bits(pb, bits_left, get_bits(gb, bits_left));
- }
-}
-
-static inline void dv_calculate_mb_xy(DVVideoContext *s, DVwork_chunk *work_chunk, int m, int *mb_x, int *mb_y)
-{
- *mb_x = work_chunk->mb_coordinates[m] & 0xff;
- *mb_y = work_chunk->mb_coordinates[m] >> 8;
-
- /* We work with 720p frames split in half. The odd half-frame (chan==2,3) is displaced :-( */
- if (s->sys->height == 720 && !(s->buf[1]&0x0C)) {
- *mb_y -= (*mb_y>17)?18:-72; /* shifting the Y coordinate down by 72/2 macro blocks */
- }
-}
-
-/* mb_x and mb_y are in units of 8 pixels */
-static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
-{
- DVVideoContext *s = avctx->priv_data;
- DVwork_chunk *work_chunk = arg;
- int quant, dc, dct_mode, class1, j;
- int mb_index, mb_x, mb_y, last_index;
- int y_stride, linesize;
- DCTELEM *block, *block1;
- int c_offset;
- uint8_t *y_ptr;
- const uint8_t *buf_ptr;
- PutBitContext pb, vs_pb;
- GetBitContext gb;
- BlockInfo mb_data[5 * DV_MAX_BPM], *mb, *mb1;
- LOCAL_ALIGNED_16(DCTELEM, sblock, [5*DV_MAX_BPM], [64]);
- LOCAL_ALIGNED_16(uint8_t, mb_bit_buffer, [80 + 4]); /* allow some slack */
- LOCAL_ALIGNED_16(uint8_t, vs_bit_buffer, [5 * 80 + 4]); /* allow some slack */
- const int log2_blocksize = 3-s->avctx->lowres;
- int is_field_mode[5];
-
- assert((((int)mb_bit_buffer) & 7) == 0);
- assert((((int)vs_bit_buffer) & 7) == 0);
-
- memset(sblock, 0, 5*DV_MAX_BPM*sizeof(*sblock));
-
- /* pass 1 : read DC and AC coefficients in blocks */
- buf_ptr = &s->buf[work_chunk->buf_offset*80];
- 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 += s->sys->bpm, block1 += s->sys->bpm * 64) {
- /* skip header */
- quant = buf_ptr[3] & 0x0f;
- buf_ptr += 4;
- init_put_bits(&pb, mb_bit_buffer, 80);
- mb = mb1;
- block = block1;
- is_field_mode[mb_index] = 0;
- for (j = 0; j < s->sys->bpm; j++) {
- last_index = s->sys->block_sizes[j];
- init_get_bits(&gb, buf_ptr, last_index);
-
- /* get the dc */
- dc = get_sbits(&gb, 9);
- dct_mode = get_bits1(&gb);
- class1 = get_bits(&gb, 2);
- if (DV_PROFILE_IS_HD(s->sys)) {
- mb->idct_put = s->idct_put[0];
- mb->scan_table = s->dv_zigzag[0];
- mb->factor_table = &s->sys->idct_factor[(j >= 4)*4*16*64 + class1*16*64 + quant*64];
- is_field_mode[mb_index] |= !j && dct_mode;
- } else {
- mb->idct_put = s->idct_put[dct_mode && log2_blocksize == 3];
- mb->scan_table = s->dv_zigzag[dct_mode];
- mb->factor_table = &s->sys->idct_factor[(class1 == 3)*2*22*64 + dct_mode*22*64 +
- (quant + dv_quant_offset[class1])*64];
- }
- dc = dc << 2;
- /* convert to unsigned because 128 is not added in the
- standard IDCT */
- dc += 1024;
- block[0] = dc;
- buf_ptr += last_index >> 3;
- mb->pos = 0;
- mb->partial_bit_count = 0;
-
-#ifdef VLC_DEBUG
- printf("MB block: %d, %d ", mb_index, j);
-#endif
- 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, &gb);
-
- block += 64;
- mb++;
- }
-
- /* pass 2 : we can do it just after */
-#ifdef VLC_DEBUG
- printf("***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index);
-#endif
- block = block1;
- mb = mb1;
- init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb));
- flush_put_bits(&pb);
- for (j = 0; j < s->sys->bpm; j++, block += 64, mb++) {
- 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;
- }
- }
- /* all blocks are finished, so the extra bytes can be used at
- the video segment level */
- if (j >= s->sys->bpm)
- 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 = &sblock[0][0];
- mb = mb_data;
- 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 < s->sys->bpm; j++) {
- if (mb->pos < 64) {
-#ifdef VLC_DEBUG
- printf("start %d:%d\n", mb_index, j);
-#endif
- dv_decode_ac(&gb, mb, block);
- }
- if (mb->pos >= 64 && mb->pos < 127)
- av_log(avctx, AV_LOG_ERROR, "AC EOB marker is absent pos=%d\n", mb->pos);
- block += 64;
- mb++;
- }
- }
-
- /* compute idct and place blocks */
- block = &sblock[0][0];
- mb = mb_data;
- for (mb_index = 0; mb_index < 5; mb_index++) {
- dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y);
-
- /* idct_put'ting luminance */
- if ((s->sys->pix_fmt == PIX_FMT_YUV420P) ||
- (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
- (s->sys->height >= 720 && mb_y != 134)) {
- y_stride = (s->picture.linesize[0] << ((!is_field_mode[mb_index]) * log2_blocksize));
- } else {
- y_stride = (2 << log2_blocksize);
- }
- y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x) << log2_blocksize);
- linesize = s->picture.linesize[0] << is_field_mode[mb_index];
- mb[0] .idct_put(y_ptr , linesize, block + 0*64);
- if (s->sys->video_stype == 4) { /* SD 422 */
- mb[2].idct_put(y_ptr + (1 << log2_blocksize) , linesize, block + 2*64);
- } else {
- mb[1].idct_put(y_ptr + (1 << log2_blocksize) , linesize, block + 1*64);
- mb[2].idct_put(y_ptr + y_stride, linesize, block + 2*64);
- mb[3].idct_put(y_ptr + (1 << log2_blocksize) + y_stride, linesize, block + 3*64);
- }
- mb += 4;
- block += 4*64;
-
- /* idct_put'ting chrominance */
- c_offset = (((mb_y >> (s->sys->pix_fmt == PIX_FMT_YUV420P)) * s->picture.linesize[1] +
- (mb_x >> ((s->sys->pix_fmt == PIX_FMT_YUV411P) ? 2 : 1))) << log2_blocksize);
- for (j = 2; j; j--) {
- uint8_t *c_ptr = s->picture.data[j] + c_offset;
- 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_ptr1, *ptr1;
- int x, y;
- mb->idct_put(pixels, 8, block);
- for (y = 0; y < (1 << log2_blocksize); y++, c_ptr += s->picture.linesize[j], pixels += 8) {
- ptr1 = pixels + (1 << (log2_blocksize - 1));
- c_ptr1 = c_ptr + (s->picture.linesize[j] << log2_blocksize);
- for (x = 0; x < (1 << (log2_blocksize - 1)); x++) {
- c_ptr[x] = pixels[x];
- c_ptr1[x] = ptr1[x];
- }
- }
- block += 64; mb++;
- } else {
- y_stride = (mb_y == 134) ? (1 << log2_blocksize) :
- s->picture.linesize[j] << ((!is_field_mode[mb_index]) * log2_blocksize);
- linesize = s->picture.linesize[j] << is_field_mode[mb_index];
- (mb++)-> idct_put(c_ptr , linesize, block); block += 64;
- if (s->sys->bpm == 8) {
- (mb++)->idct_put(c_ptr + y_stride, linesize, block); block += 64;
- }
- }
- }
- }
- return 0;
-}
-
-#if CONFIG_SMALL
-/* Converts run and level (where level != 0) pair into vlc, returning bit size */
-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) {
- *vlc = dv_vlc_map[run][level].vlc | sign;
- size = dv_vlc_map[run][level].size;
- }
- else {
- if (level < DV_VLC_MAP_LEV_SIZE) {
- *vlc = dv_vlc_map[0][level].vlc | sign;
- size = dv_vlc_map[0][level].size;
- } else {
- *vlc = 0xfe00 | (level << 1) | sign;
- size = 16;
- }
- if (run) {
- *vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc :
- (0x1f80 | (run - 1))) << size;
- size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
- }
- }
-
- return size;
-}
-
-static av_always_inline int dv_rl2vlc_size(int run, int level)
-{
- int size;
-
- if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
- size = dv_vlc_map[run][level].size;
- }
- else {
- size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
- if (run) {
- size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
- }
- }
- return size;
-}
-#else
-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 av_always_inline int dv_rl2vlc_size(int run, int l)
-{
- return dv_vlc_map[run][l].size;
-}
-#endif
-
-typedef struct EncBlockInfo {
- int area_q[4];
- int bit_size[4];
- int prev[5];
- int cur_ac;
- int cno;
- int dct_mode;
- DCTELEM mb[64];
- uint8_t next[64];
- uint8_t sign[64];
- uint8_t partial_bit_count;
- uint32_t partial_bit_buffer; /* we can't use uint16_t here */
-} EncBlockInfo;
-
-static av_always_inline PutBitContext* dv_encode_ac(EncBlockInfo* bi,
- PutBitContext* pb_pool,
- PutBitContext* pb_end)
-{
- int prev, bits_left;
- PutBitContext* pb = pb_pool;
- int size = bi->partial_bit_count;
- uint32_t vlc = bi->partial_bit_buffer;
-
- bi->partial_bit_count = bi->partial_bit_buffer = 0;
- for (;;){
- /* Find suitable storage space */
- for (; size > (bits_left = put_bits_left(pb)); pb++) {
- if (bits_left) {
- size -= bits_left;
- put_bits(pb, bits_left, vlc >> size);
- vlc = vlc & ((1 << size) - 1);
- }
- if (pb + 1 >= pb_end) {
- bi->partial_bit_count = size;
- bi->partial_bit_buffer = vlc;
- return pb;
- }
- }
-
- /* Store VLC */
- put_bits(pb, size, vlc);
-
- if (bi->cur_ac >= 64)
- break;
-
- /* Construct the next VLC */
- prev = bi->cur_ac;
- bi->cur_ac = bi->next[prev];
- if (bi->cur_ac < 64){
- size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], bi->sign[bi->cur_ac], &vlc);
- } else {
- size = 4; vlc = 6; /* End Of Block stamp */
- }
- }
- return pb;
-}
-
-static av_always_inline int dv_guess_dct_mode(DVVideoContext *s, uint8_t *data, int linesize) {
- if (s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
- int ps = s->ildct_cmp(NULL, data, NULL, linesize, 8) - 400;
- if (ps > 0) {
- int is = s->ildct_cmp(NULL, data , NULL, linesize<<1, 4) +
- s->ildct_cmp(NULL, data + linesize, NULL, linesize<<1, 4);
- return (ps > is);
- }
- }
-
- return 0;
-}
-
-static av_always_inline int dv_init_enc_block(EncBlockInfo* bi, uint8_t *data, int linesize, DVVideoContext *s, int bias)
-{
- const int *weight;
- const uint8_t* zigzag_scan;
- LOCAL_ALIGNED_16(DCTELEM, blk, [64]);
- 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};
-#else /* improved FFmpeg method */
- static const int classes[] = {-1, -1, 255, 0xffff};
-#endif
- int max = classes[0];
- int prev = 0;
-
- assert((((int)blk) & 15) == 0);
-
- bi->area_q[0] = bi->area_q[1] = bi->area_q[2] = bi->area_q[3] = 0;
- bi->partial_bit_count = 0;
- bi->partial_bit_buffer = 0;
- bi->cur_ac = 0;
- if (data) {
- bi->dct_mode = dv_guess_dct_mode(s, data, linesize);
- s->get_pixels(blk, data, linesize);
- s->fdct[bi->dct_mode](blk);
- } else {
- /* 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(blk, 0, 64*sizeof(*blk));
- bi->dct_mode = 0;
- }
- bi->mb[0] = blk[0];
-
- zigzag_scan = bi->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct;
- weight = bi->dct_mode ? dv_weight_248 : dv_weight_88;
-
- for (area = 0; area < 4; area++) {
- bi->prev[area] = prev;
- bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
- for (i = mb_area_start[area]; i < mb_area_start[area+1]; i++) {
- int level = blk[zigzag_scan[i]];
-
- if (level + 15 > 30U) {
- bi->sign[i] = (level >> 31) & 1;
- /* 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;
- prev = i;
- }
- }
- }
- bi->next[prev]= i;
- for (bi->cno = 0; max > classes[bi->cno]; bi->cno++);
-
- bi->cno += bias;
-
- if (bi->cno >= 3) {
- bi->cno = 3;
- prev = 0;
- i = bi->next[prev];
- for (area = 0; area < 4; area++) {
- bi->prev[area] = prev;
- bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
- for (; i < mb_area_start[area+1]; i = bi->next[i]) {
- bi->mb[i] >>= 1;
-
- if (bi->mb[i]) {
- bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]);
- bi->next[prev]= i;
- prev = i;
- }
- }
- }
- bi->next[prev]= i;
- }
-
- return bi->bit_size[0] + bi->bit_size[1] + bi->bit_size[2] + bi->bit_size[3];
-}
-
-static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos)
-{
- int size[5];
- int i, j, k, a, prev, a2;
- EncBlockInfo* b;
-
- size[0] = size[1] = size[2] = size[3] = size[4] = 1 << 24;
- do {
- b = blks;
- for (i = 0; i < 5; i++) {
- if (!qnos[i])
- continue;
-
- qnos[i]--;
- size[i] = 0;
- for (j = 0; j < 6; j++, b++) {
- for (a = 0; a < 4; a++) {
- if (b->area_q[a] != dv_quant_shifts[qnos[i] + dv_quant_offset[b->cno]][a]) {
- 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]) {
- b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, 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++)
- 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];
- }
- }
- b->prev[a+1]= prev;
- }
- size[i] += b->bit_size[a];
- }
- }
- if (vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4])
- return;
- }
- } while (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]);
-
-
- for (a = 2; a == 2 || vs_total_ac_bits < size[0]; a += a){
- b = blks;
- 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]) {
- if (b->mb[k] < a && b->mb[k] > -a){
- b->next[prev] = b->next[k];
- }else{
- size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
- prev = k;
- }
- }
- }
- }
-}
-
-static int dv_encode_video_segment(AVCodecContext *avctx, void *arg)
-{
- DVVideoContext *s = avctx->priv_data;
- DVwork_chunk *work_chunk = arg;
- int mb_index, i, j;
- int mb_x, mb_y, c_offset, linesize, y_stride;
- uint8_t* y_ptr;
- uint8_t* dif;
- LOCAL_ALIGNED_8(uint8_t, scratch, [64]);
- EncBlockInfo enc_blks[5*DV_MAX_BPM];
- PutBitContext pbs[5*DV_MAX_BPM];
- PutBitContext* pb;
- EncBlockInfo* enc_blk;
- int vs_bit_size = 0;
- int qnos[5] = {15, 15, 15, 15, 15}; /* No quantization */
- int* qnosp = &qnos[0];
-
- dif = &s->buf[work_chunk->buf_offset*80];
- enc_blk = &enc_blks[0];
- for (mb_index = 0; mb_index < 5; mb_index++) {
- dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y);
-
- /* initializing luminance blocks */
- if ((s->sys->pix_fmt == PIX_FMT_YUV420P) ||
- (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
- (s->sys->height >= 720 && mb_y != 134)) {
- y_stride = s->picture.linesize[0] << 3;
- } else {
- y_stride = 16;
- }
- y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x) << 3);
- linesize = s->picture.linesize[0];
-
- if (s->sys->video_stype == 4) { /* SD 422 */
- vs_bit_size +=
- dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
- dv_init_enc_block(enc_blk+1, NULL , linesize, s, 0) +
- dv_init_enc_block(enc_blk+2, y_ptr + 8 , linesize, s, 0) +
- dv_init_enc_block(enc_blk+3, NULL , linesize, s, 0);
- } else {
- vs_bit_size +=
- dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
- dv_init_enc_block(enc_blk+1, y_ptr + 8 , linesize, s, 0) +
- dv_init_enc_block(enc_blk+2, y_ptr + y_stride, linesize, s, 0) +
- dv_init_enc_block(enc_blk+3, y_ptr + 8 + y_stride, linesize, s, 0);
- }
- enc_blk += 4;
-
- /* initializing chrominance blocks */
- c_offset = (((mb_y >> (s->sys->pix_fmt == PIX_FMT_YUV420P)) * s->picture.linesize[1] +
- (mb_x >> ((s->sys->pix_fmt == PIX_FMT_YUV411P) ? 2 : 1))) << 3);
- for (j = 2; j; j--) {
- uint8_t *c_ptr = s->picture.data[j] + c_offset;
- linesize = s->picture.linesize[j];
- y_stride = (mb_y == 134) ? 8 : (s->picture.linesize[j] << 3);
- if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
- uint8_t* d;
- uint8_t* b = scratch;
- for (i = 0; i < 8; i++) {
- d = c_ptr + (linesize << 3);
- b[0] = c_ptr[0]; b[1] = c_ptr[1]; b[2] = c_ptr[2]; b[3] = c_ptr[3];
- b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3];
- c_ptr += linesize;
- b += 8;
- }
- c_ptr = scratch;
- linesize = 8;
- }
-
- vs_bit_size += dv_init_enc_block( enc_blk++, c_ptr , linesize, s, 1);
- if (s->sys->bpm == 8) {
- vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr + y_stride, linesize, s, 1);
- }
- }
- }
-
- if (vs_total_ac_bits < vs_bit_size)
- dv_guess_qnos(&enc_blks[0], qnosp);
-
- /* DIF encoding process */
- for (j=0; j<5*s->sys->bpm;) {
- int start_mb = j;
-
- dif[3] = *qnosp++;
- dif += 4;
-
- /* First pass over individual cells only */
- for (i=0; i<s->sys->bpm; i++, j++) {
- int sz = s->sys->block_sizes[i]>>3;
-
- init_put_bits(&pbs[j], dif, sz);
- put_sbits(&pbs[j], 9, ((enc_blks[j].mb[0] >> 3) - 1024 + 2) >> 2);
- put_bits(&pbs[j], 1, enc_blks[j].dct_mode);
- put_bits(&pbs[j], 2, enc_blks[j].cno);
-
- dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j+1]);
- dif += sz;
- }
-
- /* Second pass over each MB space */
- pb = &pbs[start_mb];
- for (i=0; i<s->sys->bpm; i++) {
- if (enc_blks[start_mb+i].partial_bit_count)
- pb = dv_encode_ac(&enc_blks[start_mb+i], pb, &pbs[start_mb+s->sys->bpm]);
- }
- }
-
- /* Third and final pass over the whole video segment space */
- pb = &pbs[0];
- for (j=0; j<5*s->sys->bpm; j++) {
- if (enc_blks[j].partial_bit_count)
- pb = dv_encode_ac(&enc_blks[j], pb, &pbs[s->sys->bpm*5]);
- if (enc_blks[j].partial_bit_count)
- av_log(avctx, AV_LOG_ERROR, "ac bitstream overflow\n");
- }
-
- for (j=0; j<5*s->sys->bpm; j++) {
- int pos;
- int size = pbs[j].size_in_bits >> 3;
- flush_put_bits(&pbs[j]);
- pos = put_bits_count(&pbs[j]) >> 3;
- if (pos > size) {
- av_log(avctx, AV_LOG_ERROR, "bitstream written beyond buffer size\n");
- return -1;
- }
- memset(pbs[j].buf + pos, 0xff, size - pos);
- }
-
- return 0;
-}
-
-#if CONFIG_DVVIDEO_DECODER
-/* NOTE: exactly one frame must be given (120000 bytes for NTSC,
- 144000 bytes for PAL - or twice those for 50Mbps) */
-static int dvvideo_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- AVPacket *avpkt)
-{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- DVVideoContext *s = avctx->priv_data;
-
- s->sys = ff_dv_frame_profile(s->sys, buf, buf_size);
- if (!s->sys || buf_size < s->sys->frame_size || dv_init_dynamic_tables(s->sys)) {
- av_log(avctx, AV_LOG_ERROR, "could not find dv frame profile\n");
- return -1; /* NOTE: we only accept several full frames */
- }
-
- if (s->picture.data[0])
- avctx->release_buffer(avctx, &s->picture);
-
- s->picture.reference = 0;
- s->picture.key_frame = 1;
- s->picture.pict_type = FF_I_TYPE;
- avctx->pix_fmt = s->sys->pix_fmt;
- avctx->time_base = s->sys->time_base;
- 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");
- return -1;
- }
- s->picture.interlaced_frame = 1;
- s->picture.top_field_first = 0;
-
- s->buf = buf;
- avctx->execute(avctx, dv_decode_video_segment, s->sys->work_chunks, NULL,
- dv_work_pool_size(s->sys), sizeof(DVwork_chunk));
-
- emms_c();
-
- /* return image */
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = s->picture;
-
- return s->sys->frame_size;
-}
-#endif /* CONFIG_DVVIDEO_DECODER */
-
-
-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);
-
- 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 */
- c->sys->video_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;
-}
-
-#if 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 macroblock: 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)
-{
- DVVideoContext *s = c->priv_data;
-
- s->sys = ff_dv_codec_profile(c);
- if (!s->sys || buf_size < s->sys->frame_size || dv_init_dynamic_tables(s->sys))
- return -1;
-
- c->pix_fmt = s->sys->pix_fmt;
- s->picture = *((AVFrame *)data);
- s->picture.key_frame = 1;
- s->picture.pict_type = FF_I_TYPE;
-
- s->buf = buf;
- c->execute(c, dv_encode_video_segment, s->sys->work_chunks, NULL,
- dv_work_pool_size(s->sys), sizeof(DVwork_chunk));
-
- 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;
-}
-
-
-#if CONFIG_DVVIDEO_ENCODER
-AVCodec dvvideo_encoder = {
- "dvvideo",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_DVVIDEO,
- sizeof(DVVideoContext),
- dvvideo_init_encoder,
- dvvideo_encode_frame,
- .pix_fmts = (const 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
-
-#if CONFIG_DVVIDEO_DECODER
-AVCodec dvvideo_decoder = {
- "dvvideo",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_DVVIDEO,
- sizeof(DVVideoContext),
- dvvideo_init,
- NULL,
- dvvideo_close,
- dvvideo_decode_frame,
- CODEC_CAP_DR1,
- NULL,
- .max_lowres = 3,
- .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
-};
-#endif
projects / ffmpeg / blobdiff