diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/dv.c')
| -rw-r--r-- | src/libffmpeg/libavcodec/dv.c | 162 |
1 files changed, 140 insertions, 22 deletions
diff --git a/src/libffmpeg/libavcodec/dv.c b/src/libffmpeg/libavcodec/dv.c index c39d70c54..76095a481 100644 --- a/src/libffmpeg/libavcodec/dv.c +++ b/src/libffmpeg/libavcodec/dv.c @@ -12,18 +12,20 @@ * 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 */ @@ -31,6 +33,7 @@ * @file dv.c * DV codec. */ +#define ALT_BITSTREAM_READER #include "avcodec.h" #include "dsputil.h" #include "mpegvideo.h" @@ -270,11 +273,6 @@ 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 }; -#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); @@ -707,7 +705,7 @@ static always_inline void dv_set_class_number(DCTELEM* blk, EncBlockInfo* bi, /* 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); + 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); @@ -1014,6 +1012,7 @@ static int dv_decode_mt(AVCodecContext *avctx, void* sl) return 0; } +#ifdef CONFIG_ENCODERS static int dv_encode_mt(AVCodecContext *avctx, void* sl) { DVVideoContext *s = avctx->priv_data; @@ -1032,7 +1031,9 @@ static int dv_encode_mt(AVCodecContext *avctx, void* sl) &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 - or twice those for 50Mbps) */ static int dvvideo_decode_frame(AVCodecContext *avctx, @@ -1072,7 +1073,132 @@ static int dvvideo_decode_frame(AVCodecContext *avctx, 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; +} + +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 */ + } + } + } +} + +#ifdef CONFIG_ENCODERS static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size, void *data) { @@ -1095,21 +1221,11 @@ static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size, 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; + dv_format_frame(s, buf); return s->sys->frame_size; } +#endif static int dvvideo_close(AVCodecContext *c) { @@ -1133,6 +1249,7 @@ AVCodec dvvideo_encoder = { }; #endif // CONFIG_DVVIDEO_ENCODER +#ifdef CONFIG_DVVIDEO_DECODER AVCodec dvvideo_decoder = { "dvvideo", CODEC_TYPE_VIDEO, @@ -1145,3 +1262,4 @@ AVCodec dvvideo_decoder = { CODEC_CAP_DR1, NULL }; +#endif |