* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
* of DV technical info.
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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 2.1 of the License, or (at your option) any later version.
*
- * Libav 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 Libav; 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
*/
* DV decoder
*/
+#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "dv.h"
+#include "dv_profile_internal.h"
#include "dvdata.h"
#include "get_bits.h"
#include "idctdsp.h"
static const int dv_iweight_bits = 14;
+static const uint16_t dv_iweight_88[64] = {
+ 32768, 16705, 16705, 17734, 17032, 17734, 18205, 18081,
+ 18081, 18205, 18725, 18562, 19195, 18562, 18725, 19266,
+ 19091, 19705, 19705, 19091, 19266, 21407, 19643, 20267,
+ 20228, 20267, 19643, 21407, 22725, 21826, 20853, 20806,
+ 20806, 20853, 21826, 22725, 23170, 23170, 21407, 21400,
+ 21407, 23170, 23170, 24598, 23786, 22018, 22018, 23786,
+ 24598, 25251, 24465, 22654, 24465, 25251, 25972, 25172,
+ 25172, 25972, 26722, 27969, 26722, 29692, 29692, 31521,
+};
+static const uint16_t dv_iweight_248[64] = {
+ 32768, 16384, 16705, 16705, 17734, 17734, 17734, 17734,
+ 18081, 18081, 18725, 18725, 21407, 21407, 19091, 19091,
+ 19195, 19195, 18205, 18205, 18725, 18725, 19705, 19705,
+ 20267, 20267, 21826, 21826, 23170, 23170, 20806, 20806,
+ 20267, 20267, 19266, 19266, 21407, 21407, 20853, 20853,
+ 21400, 21400, 23786, 23786, 24465, 24465, 22018, 22018,
+ 23170, 23170, 22725, 22725, 24598, 24598, 24465, 24465,
+ 25172, 25172, 27969, 27969, 25972, 25972, 29692, 29692
+};
+
+/**
+ * The "inverse" DV100 weights are actually just the spec weights (zig-zagged).
+ */
+static const uint16_t dv_iweight_1080_y[64] = {
+ 128, 16, 16, 17, 17, 17, 18, 18,
+ 18, 18, 18, 18, 19, 18, 18, 19,
+ 19, 19, 19, 19, 19, 42, 38, 40,
+ 40, 40, 38, 42, 44, 43, 41, 41,
+ 41, 41, 43, 44, 45, 45, 42, 42,
+ 42, 45, 45, 48, 46, 43, 43, 46,
+ 48, 49, 48, 44, 48, 49, 101, 98,
+ 98, 101, 104, 109, 104, 116, 116, 123,
+};
+static const uint16_t dv_iweight_1080_c[64] = {
+ 128, 16, 16, 17, 17, 17, 25, 25,
+ 25, 25, 26, 25, 26, 25, 26, 26,
+ 26, 27, 27, 26, 26, 42, 38, 40,
+ 40, 40, 38, 42, 44, 43, 41, 41,
+ 41, 41, 43, 44, 91, 91, 84, 84,
+ 84, 91, 91, 96, 93, 86, 86, 93,
+ 96, 197, 191, 177, 191, 197, 203, 197,
+ 197, 203, 209, 219, 209, 232, 232, 246,
+};
+static const uint16_t dv_iweight_720_y[64] = {
+ 128, 16, 16, 17, 17, 17, 18, 18,
+ 18, 18, 18, 18, 19, 18, 18, 19,
+ 19, 19, 19, 19, 19, 42, 38, 40,
+ 40, 40, 38, 42, 44, 43, 41, 41,
+ 41, 41, 43, 44, 68, 68, 63, 63,
+ 63, 68, 68, 96, 92, 86, 86, 92,
+ 96, 98, 96, 88, 96, 98, 202, 196,
+ 196, 202, 208, 218, 208, 232, 232, 246,
+};
+static const uint16_t dv_iweight_720_c[64] = {
+ 128, 24, 24, 26, 26, 26, 36, 36,
+ 36, 36, 36, 36, 38, 36, 36, 38,
+ 38, 38, 38, 38, 38, 84, 76, 80,
+ 80, 80, 76, 84, 88, 86, 82, 82,
+ 82, 82, 86, 88, 182, 182, 168, 168,
+ 168, 182, 182, 192, 186, 192, 172, 186,
+ 192, 394, 382, 354, 382, 394, 406, 394,
+ 394, 406, 418, 438, 418, 464, 464, 492,
+};
+
+static void dv_init_weight_tables(DVVideoContext *ctx, const AVDVProfile *d)
+{
+ int j, i, c, s;
+ uint32_t *factor1 = &ctx->idct_factor[0],
+ *factor2 = &ctx->idct_factor[DV_PROFILE_IS_HD(d) ? 4096 : 2816];
+
+ if (DV_PROFILE_IS_HD(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
+ };
+ const uint16_t *iweight1, *iweight2;
+
+ 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];
+ }
+ 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 {
+ static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 };
+ const uint16_t *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] << (ff_dv_quant_shifts[s][c] + 1);
+ *factor2++ = (*factor1++) << 1;
+ }
+ }
+ }
+ }
+ }
+}
+
static av_cold int dvvideo_decode_init(AVCodecContext *avctx)
{
DVVideoContext *s = avctx->priv_data;
IDCTDSPContext idsp;
int i;
+ memset(&idsp,0, sizeof(idsp));
ff_idctdsp_init(&idsp, avctx);
for (i = 0; i < 64; i++)
s->dv_zigzag[0][i] = idsp.idct_permutation[ff_zigzag_direct[i]];
- memcpy(s->dv_zigzag[1], ff_dv_zigzag248_direct, sizeof(s->dv_zigzag[1]));
+ if (avctx->lowres){
+ for (i = 0; i < 64; i++){
+ int j = ff_dv_zigzag248_direct[i];
+ s->dv_zigzag[1][i] = idsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2];
+ }
+ }else
+ memcpy(s->dv_zigzag[1], ff_dv_zigzag248_direct, sizeof(s->dv_zigzag[1]));
s->idct_put[0] = idsp.idct_put;
s->idct_put[1] = ff_simple_idct248_put;
LOCAL_ALIGNED_16(int16_t, sblock, [5 * DV_MAX_BPM], [64]);
LOCAL_ALIGNED_16(uint8_t, mb_bit_buffer, [80 + AV_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */
LOCAL_ALIGNED_16(uint8_t, vs_bit_buffer, [80 * 5 + AV_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */
- const int log2_blocksize = 3;
+ const int log2_blocksize = 3-s->avctx->lowres;
int is_field_mode[5];
+ int vs_bit_buffer_damaged = 0;
+ int mb_bit_buffer_damaged[5] = {0};
+ int retried = 0;
+ int sta;
+
+ av_assert1((((int) mb_bit_buffer) & 7) == 0);
+ av_assert1((((int) vs_bit_buffer) & 7) == 0);
- assert((((int) mb_bit_buffer) & 7) == 0);
- assert((((int) vs_bit_buffer) & 7) == 0);
+retry:
memset(sblock, 0, 5 * DV_MAX_BPM * sizeof(*sblock));
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;
+ if (avctx->error_concealment) {
+ if ((buf_ptr[3] >> 4) == 0x0E)
+ vs_bit_buffer_damaged = 1;
+ if (!mb_index) {
+ sta = buf_ptr[3] >> 4;
+ } else if (sta != (buf_ptr[3] >> 4))
+ vs_bit_buffer_damaged = 1;
+ }
buf_ptr += 4;
init_put_bits(&pb, mb_bit_buffer, 80);
mb = mb1;
* block is finished */
if (mb->pos >= 64)
bit_copy(&pb, &gb);
+ if (mb->pos >= 64 && mb->pos < 127)
+ vs_bit_buffer_damaged = mb_bit_buffer_damaged[mb_index] = 1;
block += 64;
mb++;
}
+ if (mb_bit_buffer_damaged[mb_index] > 0)
+ continue;
+
/* pass 2: we can do it just after */
ff_dlog(avctx, "***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index);
block = block1;
/* if still not finished, no need to parse other blocks */
if (mb->pos < 64)
break;
+ if (mb->pos < 127)
+ vs_bit_buffer_damaged = mb_bit_buffer_damaged[mb_index] = 1;
}
}
/* all blocks are finished, so the extra bytes can be used at
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) {
+ if (mb->pos < 64 && get_bits_left(&gb) > 0 && !vs_bit_buffer_damaged) {
ff_dlog(avctx, "start %d:%d\n", mb_index, j);
dv_decode_ac(&gb, mb, block);
}
- if (mb->pos >= 64 && mb->pos < 127)
+
+ if (mb->pos >= 64 && mb->pos < 127) {
av_log(avctx, AV_LOG_ERROR,
"AC EOB marker is absent pos=%d\n", mb->pos);
+ vs_bit_buffer_damaged = 1;
+ }
block += 64;
mb++;
}
}
+ if (vs_bit_buffer_damaged && !retried) {
+ av_log(avctx, AV_LOG_ERROR, "Concealing bitstream errors\n");
+ retried = 1;
+ goto retry;
+ }
/* compute idct and place blocks */
block = &sblock[0][0];
int x, y;
mb->idct_put(pixels, 8, block);
for (y = 0; y < (1 << log2_blocksize); y++, c_ptr += s->frame->linesize[j], pixels += 8) {
- ptr1 = pixels + (1 << (log2_blocksize - 1));
+ ptr1 = pixels + ((1 << (log2_blocksize))>>1);
c_ptr1 = c_ptr + (s->frame->linesize[j] << log2_blocksize);
- for (x = 0; x < (1 << (log2_blocksize - 1)); x++) {
+ for (x = 0; x < (1 << FFMAX(log2_blocksize - 1, 0)); x++) {
c_ptr[x] = pixels[x];
c_ptr1[x] = ptr1[x];
}
uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
DVVideoContext *s = avctx->priv_data;
+ AVFrame *frame = data;
const uint8_t *vsc_pack;
int apt, is16_9, ret;
const AVDVProfile *sys;
- sys = av_dv_frame_profile(s->sys, buf, buf_size);
+ sys = ff_dv_frame_profile(avctx, s->sys, buf, buf_size);
if (!sys || buf_size < sys->frame_size) {
av_log(avctx, AV_LOG_ERROR, "could not find dv frame profile\n");
return -1; /* NOTE: we only accept several full frames */
av_log(avctx, AV_LOG_ERROR, "Error initializing the work tables.\n");
return ret;
}
+ dv_init_weight_tables(s, sys);
s->sys = sys;
}
- s->frame = data;
- s->frame->key_frame = 1;
- s->frame->pict_type = AV_PICTURE_TYPE_I;
+ s->frame = frame;
+ frame->key_frame = 1;
+ frame->pict_type = AV_PICTURE_TYPE_I;
avctx->pix_fmt = s->sys->pix_fmt;
avctx->framerate = av_inv_q(s->sys->time_base);
ff_set_sar(avctx, s->sys->sar[is16_9]);
}
- if ((ret = ff_get_buffer(avctx, s->frame, 0)) < 0)
- if (ff_get_buffer(avctx, frame, 0) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
++ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+ return ret;
- s->frame->interlaced_frame = 1;
- s->frame->top_field_first = 0;
+ frame->interlaced_frame = 1;
+ frame->top_field_first = 0;
- s->frame->top_field_first = !(vsc_pack[3] & 0x40);
+ /* Determine the codec's field order from the packet */
+ if ( *vsc_pack == dv_video_control ) {
++ frame->top_field_first = !(vsc_pack[3] & 0x40);
+ }
+
s->buf = buf;
avctx->execute(avctx, dv_decode_video_segment, s->work_chunks, NULL,
dv_work_pool_size(s->sys), sizeof(DVwork_chunk));
.init = dvvideo_decode_init,
.decode = dvvideo_decode_frame,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,
+ .max_lowres = 3,
};
projects / ffmpeg / commitdiff