diff options
Diffstat (limited to 'libavcodec/dvdec.c')
| -rw-r--r-- | libavcodec/dvdec.c | 188 |
1 files changed, 171 insertions, 17 deletions
diff --git a/libavcodec/dvdec.c b/libavcodec/dvdec.c index 9ee9933..679075e 100644 --- a/libavcodec/dvdec.c +++ b/libavcodec/dvdec.c @@ -13,20 +13,20 @@ * 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 */ @@ -35,12 +35,14 @@ * 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" @@ -60,18 +62,136 @@ typedef struct BlockInfo { 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; @@ -169,11 +289,17 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg) 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)); @@ -185,6 +311,14 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg) 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; @@ -229,11 +363,16 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg) * 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; @@ -247,6 +386,8 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg) /* 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 @@ -264,17 +405,25 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg) 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]; @@ -317,9 +466,9 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg) 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]; } @@ -354,7 +503,7 @@ static int dvvideo_decode_frame(AVCodecContext *avctx, void *data, 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 */ @@ -366,6 +515,7 @@ static int dvvideo_decode_frame(AVCodecContext *avctx, void *data, av_log(avctx, AV_LOG_ERROR, "Error initializing the work tables.\n"); return ret; } + dv_init_weight_tables(s, sys); s->sys = sys; } @@ -388,13 +538,16 @@ static int dvvideo_decode_frame(AVCodecContext *avctx, void *data, ff_set_sar(avctx, s->sys->sar[is16_9]); } - if (ff_get_buffer(avctx, s->frame, 0) < 0) { - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return -1; - } + if ((ret = ff_get_buffer(avctx, s->frame, 0)) < 0) + return ret; s->frame->interlaced_frame = 1; s->frame->top_field_first = 0; + /* Determine the codec's field order from the packet */ + if ( *vsc_pack == dv_video_control ) { + s->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)); @@ -416,4 +569,5 @@ AVCodec ff_dvvideo_decoder = { .init = dvvideo_decode_init, .decode = dvvideo_decode_frame, .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS, + .max_lowres = 3, }; |
