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942 lines
29 KiB
942 lines
29 KiB
/* |
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* GXF muxer. |
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* Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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#include "libavutil/intfloat.h" |
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#include "libavutil/mathematics.h" |
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#include "avformat.h" |
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#include "internal.h" |
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#include "gxf.h" |
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#include "riff.h" |
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#include "audiointerleave.h" |
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#define GXF_AUDIO_PACKET_SIZE 65536 |
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typedef struct GXFStreamContext { |
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AudioInterleaveContext aic; |
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uint32_t track_type; |
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uint32_t sample_size; |
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uint32_t sample_rate; |
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uint16_t media_type; |
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uint16_t media_info; |
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int frame_rate_index; |
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int lines_index; |
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int fields; |
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int iframes; |
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int pframes; |
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int bframes; |
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int p_per_gop; |
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int b_per_i_or_p; ///< number of B frames per I frame or P frame |
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int first_gop_closed; |
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unsigned order; ///< interleaving order |
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} GXFStreamContext; |
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|
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typedef struct GXFContext { |
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uint32_t nb_fields; |
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uint16_t audio_tracks; |
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uint16_t mpeg_tracks; |
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int64_t creation_time; |
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uint32_t umf_start_offset; |
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uint32_t umf_track_offset; |
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uint32_t umf_media_offset; |
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uint32_t umf_length; |
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uint16_t umf_track_size; |
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uint16_t umf_media_size; |
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AVRational time_base; |
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int flags; |
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GXFStreamContext timecode_track; |
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unsigned *flt_entries; ///< offsets of packets /1024, starts after 2nd video field |
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unsigned flt_entries_nb; |
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uint64_t *map_offsets; ///< offset of map packets |
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unsigned map_offsets_nb; |
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unsigned packet_count; |
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} GXFContext; |
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|
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static const struct { |
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int height, index; |
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} gxf_lines_tab[] = { |
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{ 480, 1 }, /* NTSC */ |
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{ 512, 1 }, /* NTSC + VBI */ |
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{ 576, 2 }, /* PAL */ |
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{ 608, 2 }, /* PAL + VBI */ |
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{ 1080, 4 }, |
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{ 720, 6 }, |
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}; |
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static const AVCodecTag gxf_media_types[] = { |
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{ AV_CODEC_ID_MJPEG , 3 }, /* NTSC */ |
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{ AV_CODEC_ID_MJPEG , 4 }, /* PAL */ |
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{ AV_CODEC_ID_PCM_S24LE , 9 }, |
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{ AV_CODEC_ID_PCM_S16LE , 10 }, |
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{ AV_CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */ |
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{ AV_CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */ |
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{ AV_CODEC_ID_DVVIDEO , 13 }, /* NTSC */ |
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{ AV_CODEC_ID_DVVIDEO , 14 }, /* PAL */ |
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{ AV_CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */ |
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{ AV_CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */ |
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{ AV_CODEC_ID_AC3 , 17 }, |
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//{ AV_CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */ |
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{ AV_CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */ |
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{ AV_CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */ |
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{ AV_CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */ |
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{ AV_CODEC_ID_NONE, 0 }, |
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}; |
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#define SERVER_PATH "EXT:/PDR/default/" |
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#define ES_NAME_PATTERN "EXT:/PDR/default/ES." |
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static int gxf_find_lines_index(AVStream *st) |
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{ |
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GXFStreamContext *sc = st->priv_data; |
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int i; |
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for (i = 0; i < 6; ++i) { |
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if (st->codec->height == gxf_lines_tab[i].height) { |
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sc->lines_index = gxf_lines_tab[i].index; |
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return 0; |
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} |
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} |
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return -1; |
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} |
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static void gxf_write_padding(AVIOContext *pb, int64_t to_pad) |
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{ |
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for (; to_pad > 0; to_pad--) { |
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avio_w8(pb, 0); |
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} |
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} |
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static int64_t updatePacketSize(AVIOContext *pb, int64_t pos) |
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{ |
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int64_t curpos; |
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int size; |
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size = avio_tell(pb) - pos; |
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if (size % 4) { |
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gxf_write_padding(pb, 4 - size % 4); |
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size = avio_tell(pb) - pos; |
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} |
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curpos = avio_tell(pb); |
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avio_seek(pb, pos + 6, SEEK_SET); |
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avio_wb32(pb, size); |
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avio_seek(pb, curpos, SEEK_SET); |
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return curpos - pos; |
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} |
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static int64_t updateSize(AVIOContext *pb, int64_t pos) |
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{ |
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int64_t curpos; |
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curpos = avio_tell(pb); |
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avio_seek(pb, pos, SEEK_SET); |
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avio_wb16(pb, curpos - pos - 2); |
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avio_seek(pb, curpos, SEEK_SET); |
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return curpos - pos; |
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} |
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static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type) |
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{ |
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avio_wb32(pb, 0); /* packet leader for synchro */ |
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avio_w8(pb, 1); |
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avio_w8(pb, type); /* map packet */ |
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avio_wb32(pb, 0); /* size */ |
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avio_wb32(pb, 0); /* reserved */ |
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avio_w8(pb, 0xE1); /* trailer 1 */ |
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avio_w8(pb, 0xE2); /* trailer 2 */ |
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} |
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static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st) |
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{ |
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GXFStreamContext *sc = st->priv_data; |
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char buffer[1024]; |
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int size, starting_line; |
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|
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if (sc->iframes) { |
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sc->p_per_gop = sc->pframes / sc->iframes; |
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if (sc->pframes % sc->iframes) |
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sc->p_per_gop++; |
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if (sc->pframes) { |
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sc->b_per_i_or_p = sc->bframes / sc->pframes; |
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if (sc->bframes % sc->pframes) |
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sc->b_per_i_or_p++; |
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} |
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if (sc->p_per_gop > 9) |
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sc->p_per_gop = 9; /* ensure value won't take more than one char */ |
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if (sc->b_per_i_or_p > 9) |
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sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */ |
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} |
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if (st->codec->height == 512 || st->codec->height == 608) |
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starting_line = 7; // VBI |
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else if (st->codec->height == 480) |
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starting_line = 20; |
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else |
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starting_line = 23; // default PAL |
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size = snprintf(buffer, 1024, "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n" |
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"Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n", |
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(float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p, |
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st->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1, |
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starting_line, (st->codec->height + 15) / 16); |
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avio_w8(pb, TRACK_MPG_AUX); |
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avio_w8(pb, size + 1); |
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avio_write(pb, (uint8_t *)buffer, size + 1); |
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return size + 3; |
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} |
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static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFStreamContext *sc) |
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{ |
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avio_w8(pb, 0); /* fields */ |
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avio_w8(pb, 0); /* seconds */ |
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avio_w8(pb, 0); /* minutes */ |
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avio_w8(pb, 0); /* flags + hours */ |
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/* reserved */ |
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avio_wb32(pb, 0); |
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return 8; |
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} |
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static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index) |
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{ |
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AVIOContext *pb = s->pb; |
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int64_t pos; |
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int mpeg = sc->track_type == 4 || sc->track_type == 9; |
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/* track description section */ |
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avio_w8(pb, sc->media_type + 0x80); |
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avio_w8(pb, index + 0xC0); |
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pos = avio_tell(pb); |
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avio_wb16(pb, 0); /* size */ |
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/* media file name */ |
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avio_w8(pb, TRACK_NAME); |
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avio_w8(pb, strlen(ES_NAME_PATTERN) + 3); |
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avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1); |
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avio_wb16(pb, sc->media_info); |
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avio_w8(pb, 0); |
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if (!mpeg) { |
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/* auxiliary information */ |
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avio_w8(pb, TRACK_AUX); |
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avio_w8(pb, 8); |
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if (sc->track_type == 3) |
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gxf_write_timecode_auxiliary(pb, sc); |
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else |
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avio_wl64(pb, 0); |
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} |
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/* file system version */ |
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avio_w8(pb, TRACK_VER); |
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avio_w8(pb, 4); |
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avio_wb32(pb, 0); |
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if (mpeg) |
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gxf_write_mpeg_auxiliary(pb, s->streams[index]); |
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/* frame rate */ |
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avio_w8(pb, TRACK_FPS); |
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avio_w8(pb, 4); |
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avio_wb32(pb, sc->frame_rate_index); |
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/* lines per frame */ |
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avio_w8(pb, TRACK_LINES); |
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avio_w8(pb, 4); |
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avio_wb32(pb, sc->lines_index); |
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/* fields per frame */ |
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avio_w8(pb, TRACK_FPF); |
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avio_w8(pb, 4); |
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avio_wb32(pb, sc->fields); |
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return updateSize(pb, pos); |
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} |
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static int gxf_write_material_data_section(AVFormatContext *s) |
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{ |
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GXFContext *gxf = s->priv_data; |
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AVIOContext *pb = s->pb; |
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int64_t pos; |
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int len; |
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const char *filename = strrchr(s->filename, '/'); |
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pos = avio_tell(pb); |
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avio_wb16(pb, 0); /* size */ |
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/* name */ |
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if (filename) |
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filename++; |
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else |
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filename = s->filename; |
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len = strlen(filename); |
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avio_w8(pb, MAT_NAME); |
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avio_w8(pb, strlen(SERVER_PATH) + len + 1); |
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avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1); |
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avio_write(pb, filename, len); |
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avio_w8(pb, 0); |
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/* first field */ |
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avio_w8(pb, MAT_FIRST_FIELD); |
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avio_w8(pb, 4); |
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avio_wb32(pb, 0); |
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/* last field */ |
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avio_w8(pb, MAT_LAST_FIELD); |
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avio_w8(pb, 4); |
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avio_wb32(pb, gxf->nb_fields); |
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/* reserved */ |
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avio_w8(pb, MAT_MARK_IN); |
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avio_w8(pb, 4); |
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avio_wb32(pb, 0); |
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avio_w8(pb, MAT_MARK_OUT); |
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avio_w8(pb, 4); |
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avio_wb32(pb, gxf->nb_fields); |
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/* estimated size */ |
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avio_w8(pb, MAT_SIZE); |
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avio_w8(pb, 4); |
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avio_wb32(pb, avio_size(pb) / 1024); |
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return updateSize(pb, pos); |
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} |
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static int gxf_write_track_description_section(AVFormatContext *s) |
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{ |
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GXFContext *gxf = s->priv_data; |
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AVIOContext *pb = s->pb; |
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int64_t pos; |
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int i; |
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pos = avio_tell(pb); |
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avio_wb16(pb, 0); /* size */ |
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for (i = 0; i < s->nb_streams; ++i) |
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gxf_write_track_description(s, s->streams[i]->priv_data, i); |
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gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams); |
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return updateSize(pb, pos); |
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} |
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static int gxf_write_map_packet(AVFormatContext *s, int rewrite) |
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{ |
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GXFContext *gxf = s->priv_data; |
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AVIOContext *pb = s->pb; |
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int64_t pos = avio_tell(pb); |
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if (!rewrite) { |
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if (!(gxf->map_offsets_nb % 30)) { |
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gxf->map_offsets = av_realloc(gxf->map_offsets, |
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(gxf->map_offsets_nb+30)*sizeof(*gxf->map_offsets)); |
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if (!gxf->map_offsets) { |
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av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n"); |
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return -1; |
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} |
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} |
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gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here |
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} |
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gxf_write_packet_header(pb, PKT_MAP); |
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|
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/* preamble */ |
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avio_w8(pb, 0xE0); /* version */ |
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avio_w8(pb, 0xFF); /* reserved */ |
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gxf_write_material_data_section(s); |
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gxf_write_track_description_section(s); |
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return updatePacketSize(pb, pos); |
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} |
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static int gxf_write_flt_packet(AVFormatContext *s) |
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{ |
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GXFContext *gxf = s->priv_data; |
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AVIOContext *pb = s->pb; |
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int64_t pos = avio_tell(pb); |
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int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1; |
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int flt_entries = gxf->nb_fields / fields_per_flt; |
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int i = 0; |
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gxf_write_packet_header(pb, PKT_FLT); |
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avio_wl32(pb, fields_per_flt); /* number of fields */ |
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avio_wl32(pb, flt_entries); /* number of active flt entries */ |
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if (gxf->flt_entries) { |
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for (i = 0; i < flt_entries; i++) |
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avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]); |
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} |
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for (; i < 1000; i++) |
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avio_wl32(pb, 0); |
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return updatePacketSize(pb, pos); |
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} |
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static int gxf_write_umf_material_description(AVFormatContext *s) |
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{ |
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GXFContext *gxf = s->priv_data; |
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AVIOContext *pb = s->pb; |
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int timecode_base = gxf->time_base.den == 60000 ? 60 : 50; |
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int64_t timestamp = 0; |
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AVDictionaryEntry *t; |
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uint32_t timecode; |
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if (t = av_dict_get(s->metadata, "creation_time", NULL, 0)) |
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timestamp = ff_iso8601_to_unix_time(t->value); |
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// XXX drop frame |
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timecode = |
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gxf->nb_fields / (timecode_base * 3600) % 24 << 24 | // hours |
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gxf->nb_fields / (timecode_base * 60) % 60 << 16 | // minutes |
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gxf->nb_fields / timecode_base % 60 << 8 | // seconds |
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gxf->nb_fields % timecode_base; // fields |
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avio_wl32(pb, gxf->flags); |
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avio_wl32(pb, gxf->nb_fields); /* length of the longest track */ |
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avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */ |
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avio_wl32(pb, 0); /* mark in */ |
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avio_wl32(pb, gxf->nb_fields); /* mark out */ |
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avio_wl32(pb, 0); /* timecode mark in */ |
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avio_wl32(pb, timecode); /* timecode mark out */ |
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avio_wl64(pb, timestamp); /* modification time */ |
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avio_wl64(pb, timestamp); /* creation time */ |
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avio_wl16(pb, 0); /* reserved */ |
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avio_wl16(pb, 0); /* reserved */ |
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avio_wl16(pb, gxf->audio_tracks); |
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avio_wl16(pb, 1); /* timecode track count */ |
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avio_wl16(pb, 0); /* reserved */ |
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avio_wl16(pb, gxf->mpeg_tracks); |
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return 48; |
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} |
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|
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static int gxf_write_umf_payload(AVFormatContext *s) |
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{ |
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GXFContext *gxf = s->priv_data; |
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AVIOContext *pb = s->pb; |
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|
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avio_wl32(pb, gxf->umf_length); /* total length of the umf data */ |
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avio_wl32(pb, 3); /* version */ |
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avio_wl32(pb, s->nb_streams+1); |
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avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */ |
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avio_wl32(pb, gxf->umf_track_size); |
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avio_wl32(pb, s->nb_streams+1); |
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avio_wl32(pb, gxf->umf_media_offset); |
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avio_wl32(pb, gxf->umf_media_size); |
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avio_wl32(pb, gxf->umf_length); /* user data offset */ |
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avio_wl32(pb, 0); /* user data size */ |
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avio_wl32(pb, 0); /* reserved */ |
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avio_wl32(pb, 0); /* reserved */ |
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return 48; |
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} |
|
|
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static int gxf_write_umf_track_description(AVFormatContext *s) |
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{ |
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AVIOContext *pb = s->pb; |
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GXFContext *gxf = s->priv_data; |
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int64_t pos = avio_tell(pb); |
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int i; |
|
|
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gxf->umf_track_offset = pos - gxf->umf_start_offset; |
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for (i = 0; i < s->nb_streams; ++i) { |
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GXFStreamContext *sc = s->streams[i]->priv_data; |
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avio_wl16(pb, sc->media_info); |
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avio_wl16(pb, 1); |
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} |
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|
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avio_wl16(pb, gxf->timecode_track.media_info); |
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avio_wl16(pb, 1); |
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|
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return avio_tell(pb) - pos; |
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} |
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|
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static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st) |
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{ |
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GXFStreamContext *sc = st->priv_data; |
|
|
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if (st->codec->pix_fmt == PIX_FMT_YUV422P) |
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avio_wl32(pb, 2); |
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else |
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avio_wl32(pb, 1); /* default to 420 */ |
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avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */ |
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avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */ |
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avio_wl32(pb, 1); /* I picture per GOP */ |
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avio_wl32(pb, sc->p_per_gop); |
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avio_wl32(pb, sc->b_per_i_or_p); |
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if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) |
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avio_wl32(pb, 2); |
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else if (st->codec->codec_id == AV_CODEC_ID_MPEG1VIDEO) |
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avio_wl32(pb, 1); |
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else |
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avio_wl32(pb, 0); |
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avio_wl32(pb, 0); /* reserved */ |
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return 32; |
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} |
|
|
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static int gxf_write_umf_media_timecode(AVIOContext *pb, GXFStreamContext *sc) |
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{ |
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avio_wl32(pb, 1); /* non drop frame */ |
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avio_wl32(pb, 0); /* reserved */ |
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avio_wl32(pb, 0); /* reserved */ |
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avio_wl32(pb, 0); /* reserved */ |
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avio_wl32(pb, 0); /* reserved */ |
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avio_wl32(pb, 0); /* reserved */ |
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avio_wl32(pb, 0); /* reserved */ |
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avio_wl32(pb, 0); /* reserved */ |
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return 32; |
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} |
|
|
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static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc) |
|
{ |
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int i; |
|
|
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for (i = 0; i < 8; i++) { |
|
avio_wb32(pb, 0); |
|
} |
|
return 32; |
|
} |
|
|
|
static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc) |
|
{ |
|
avio_wl64(pb, av_double2int(1)); /* sound level to begin to */ |
|
avio_wl64(pb, av_double2int(1)); /* sound level to begin to */ |
|
avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */ |
|
avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */ |
|
avio_wl32(pb, 0); /* reserved */ |
|
avio_wl32(pb, 0); /* reserved */ |
|
return 32; |
|
} |
|
|
|
static int gxf_write_umf_media_description(AVFormatContext *s) |
|
{ |
|
GXFContext *gxf = s->priv_data; |
|
AVIOContext *pb = s->pb; |
|
int64_t pos; |
|
int i, j; |
|
|
|
pos = avio_tell(pb); |
|
gxf->umf_media_offset = pos - gxf->umf_start_offset; |
|
for (i = 0; i <= s->nb_streams; ++i) { |
|
GXFStreamContext *sc; |
|
int64_t startpos, curpos; |
|
|
|
if (i == s->nb_streams) |
|
sc = &gxf->timecode_track; |
|
else |
|
sc = s->streams[i]->priv_data; |
|
|
|
startpos = avio_tell(pb); |
|
avio_wl16(pb, 0); /* length */ |
|
avio_wl16(pb, sc->media_info); |
|
avio_wl16(pb, 0); /* reserved */ |
|
avio_wl16(pb, 0); /* reserved */ |
|
avio_wl32(pb, gxf->nb_fields); |
|
avio_wl32(pb, 0); /* attributes rw, ro */ |
|
avio_wl32(pb, 0); /* mark in */ |
|
avio_wl32(pb, gxf->nb_fields); /* mark out */ |
|
avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN)); |
|
avio_wb16(pb, sc->media_info); |
|
for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++) |
|
avio_w8(pb, 0); |
|
avio_wl32(pb, sc->track_type); |
|
avio_wl32(pb, sc->sample_rate); |
|
avio_wl32(pb, sc->sample_size); |
|
avio_wl32(pb, 0); /* reserved */ |
|
|
|
if (sc == &gxf->timecode_track) |
|
gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */ |
|
else { |
|
AVStream *st = s->streams[i]; |
|
switch (st->codec->codec_id) { |
|
case AV_CODEC_ID_MPEG1VIDEO: |
|
case AV_CODEC_ID_MPEG2VIDEO: |
|
gxf_write_umf_media_mpeg(pb, st); |
|
break; |
|
case AV_CODEC_ID_PCM_S16LE: |
|
gxf_write_umf_media_audio(pb, sc); |
|
break; |
|
case AV_CODEC_ID_DVVIDEO: |
|
gxf_write_umf_media_dv(pb, sc); |
|
break; |
|
} |
|
} |
|
|
|
curpos = avio_tell(pb); |
|
avio_seek(pb, startpos, SEEK_SET); |
|
avio_wl16(pb, curpos - startpos); |
|
avio_seek(pb, curpos, SEEK_SET); |
|
} |
|
return avio_tell(pb) - pos; |
|
} |
|
|
|
static int gxf_write_umf_packet(AVFormatContext *s) |
|
{ |
|
GXFContext *gxf = s->priv_data; |
|
AVIOContext *pb = s->pb; |
|
int64_t pos = avio_tell(pb); |
|
|
|
gxf_write_packet_header(pb, PKT_UMF); |
|
|
|
/* preamble */ |
|
avio_w8(pb, 3); /* first and last (only) packet */ |
|
avio_wb32(pb, gxf->umf_length); /* data length */ |
|
|
|
gxf->umf_start_offset = avio_tell(pb); |
|
gxf_write_umf_payload(s); |
|
gxf_write_umf_material_description(s); |
|
gxf->umf_track_size = gxf_write_umf_track_description(s); |
|
gxf->umf_media_size = gxf_write_umf_media_description(s); |
|
gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset; |
|
return updatePacketSize(pb, pos); |
|
} |
|
|
|
static const int GXF_samples_per_frame[] = { 32768, 0 }; |
|
|
|
static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc) |
|
{ |
|
if (!vsc) |
|
return; |
|
|
|
sc->media_type = vsc->sample_rate == 60 ? 7 : 8; |
|
sc->sample_rate = vsc->sample_rate; |
|
sc->media_info = ('T'<<8) | '0'; |
|
sc->track_type = 3; |
|
sc->frame_rate_index = vsc->frame_rate_index; |
|
sc->lines_index = vsc->lines_index; |
|
sc->sample_size = 16; |
|
sc->fields = vsc->fields; |
|
} |
|
|
|
static int gxf_write_header(AVFormatContext *s) |
|
{ |
|
AVIOContext *pb = s->pb; |
|
GXFContext *gxf = s->priv_data; |
|
GXFStreamContext *vsc = NULL; |
|
uint8_t tracks[255] = {0}; |
|
int i, media_info = 0; |
|
|
|
if (!pb->seekable) { |
|
av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome"); |
|
return -1; |
|
} |
|
|
|
gxf->flags |= 0x00080000; /* material is simple clip */ |
|
for (i = 0; i < s->nb_streams; ++i) { |
|
AVStream *st = s->streams[i]; |
|
GXFStreamContext *sc = av_mallocz(sizeof(*sc)); |
|
if (!sc) |
|
return AVERROR(ENOMEM); |
|
st->priv_data = sc; |
|
|
|
sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id); |
|
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
|
if (st->codec->codec_id != AV_CODEC_ID_PCM_S16LE) { |
|
av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n"); |
|
return -1; |
|
} |
|
if (st->codec->sample_rate != 48000) { |
|
av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n"); |
|
return -1; |
|
} |
|
if (st->codec->channels != 1) { |
|
av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n"); |
|
return -1; |
|
} |
|
sc->track_type = 2; |
|
sc->sample_rate = st->codec->sample_rate; |
|
avpriv_set_pts_info(st, 64, 1, sc->sample_rate); |
|
sc->sample_size = 16; |
|
sc->frame_rate_index = -2; |
|
sc->lines_index = -2; |
|
sc->fields = -2; |
|
gxf->audio_tracks++; |
|
gxf->flags |= 0x04000000; /* audio is 16 bit pcm */ |
|
media_info = 'A'; |
|
} else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
|
if (i != 0) { |
|
av_log(s, AV_LOG_ERROR, "video stream must be the first track\n"); |
|
return -1; |
|
} |
|
/* FIXME check from time_base ? */ |
|
if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */ |
|
sc->frame_rate_index = 5; |
|
sc->sample_rate = 60; |
|
gxf->flags |= 0x00000080; |
|
gxf->time_base = (AVRational){ 1001, 60000 }; |
|
} else if (st->codec->height == 576 || st->codec->height == 608) { /* PAL or PAL+VBI */ |
|
sc->frame_rate_index = 6; |
|
sc->media_type++; |
|
sc->sample_rate = 50; |
|
gxf->flags |= 0x00000040; |
|
gxf->time_base = (AVRational){ 1, 50 }; |
|
} else { |
|
av_log(s, AV_LOG_ERROR, "unsupported video resolution, " |
|
"gxf muxer only accepts PAL or NTSC resolutions currently\n"); |
|
return -1; |
|
} |
|
avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den); |
|
if (gxf_find_lines_index(st) < 0) |
|
sc->lines_index = -1; |
|
sc->sample_size = st->codec->bit_rate; |
|
sc->fields = 2; /* interlaced */ |
|
|
|
vsc = sc; |
|
|
|
switch (st->codec->codec_id) { |
|
case AV_CODEC_ID_MJPEG: |
|
sc->track_type = 1; |
|
gxf->flags |= 0x00004000; |
|
media_info = 'J'; |
|
break; |
|
case AV_CODEC_ID_MPEG1VIDEO: |
|
sc->track_type = 9; |
|
gxf->mpeg_tracks++; |
|
media_info = 'L'; |
|
break; |
|
case AV_CODEC_ID_MPEG2VIDEO: |
|
sc->first_gop_closed = -1; |
|
sc->track_type = 4; |
|
gxf->mpeg_tracks++; |
|
gxf->flags |= 0x00008000; |
|
media_info = 'M'; |
|
break; |
|
case AV_CODEC_ID_DVVIDEO: |
|
if (st->codec->pix_fmt == PIX_FMT_YUV422P) { |
|
sc->media_type += 2; |
|
sc->track_type = 6; |
|
gxf->flags |= 0x00002000; |
|
media_info = 'E'; |
|
} else { |
|
sc->track_type = 5; |
|
gxf->flags |= 0x00001000; |
|
media_info = 'D'; |
|
} |
|
break; |
|
default: |
|
av_log(s, AV_LOG_ERROR, "video codec not supported\n"); |
|
return -1; |
|
} |
|
} |
|
/* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */ |
|
sc->media_info = media_info<<8 | ('0'+tracks[media_info]++); |
|
sc->order = s->nb_streams - st->index; |
|
} |
|
|
|
if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0) |
|
return -1; |
|
|
|
gxf_init_timecode_track(&gxf->timecode_track, vsc); |
|
gxf->flags |= 0x200000; // time code track is non-drop frame |
|
|
|
gxf_write_map_packet(s, 0); |
|
gxf_write_flt_packet(s); |
|
gxf_write_umf_packet(s); |
|
|
|
gxf->packet_count = 3; |
|
|
|
avio_flush(pb); |
|
return 0; |
|
} |
|
|
|
static int gxf_write_eos_packet(AVIOContext *pb) |
|
{ |
|
int64_t pos = avio_tell(pb); |
|
|
|
gxf_write_packet_header(pb, PKT_EOS); |
|
return updatePacketSize(pb, pos); |
|
} |
|
|
|
static int gxf_write_trailer(AVFormatContext *s) |
|
{ |
|
GXFContext *gxf = s->priv_data; |
|
AVIOContext *pb = s->pb; |
|
int64_t end; |
|
int i; |
|
|
|
ff_audio_interleave_close(s); |
|
|
|
gxf_write_eos_packet(pb); |
|
end = avio_tell(pb); |
|
avio_seek(pb, 0, SEEK_SET); |
|
/* overwrite map, flt and umf packets with new values */ |
|
gxf_write_map_packet(s, 1); |
|
gxf_write_flt_packet(s); |
|
gxf_write_umf_packet(s); |
|
avio_flush(pb); |
|
/* update duration in all map packets */ |
|
for (i = 1; i < gxf->map_offsets_nb; i++) { |
|
avio_seek(pb, gxf->map_offsets[i], SEEK_SET); |
|
gxf_write_map_packet(s, 1); |
|
avio_flush(pb); |
|
} |
|
|
|
avio_seek(pb, end, SEEK_SET); |
|
|
|
av_freep(&gxf->flt_entries); |
|
av_freep(&gxf->map_offsets); |
|
|
|
return 0; |
|
} |
|
|
|
static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size) |
|
{ |
|
uint32_t c=-1; |
|
int i; |
|
for(i=0; i<size-4 && c!=0x100; i++){ |
|
c = (c<<8) + buf[i]; |
|
if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */ |
|
sc->first_gop_closed= (buf[i+4]>>6)&1; |
|
} |
|
return (buf[i+1]>>3)&7; |
|
} |
|
|
|
static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size) |
|
{ |
|
GXFContext *gxf = s->priv_data; |
|
AVIOContext *pb = s->pb; |
|
AVStream *st = s->streams[pkt->stream_index]; |
|
GXFStreamContext *sc = st->priv_data; |
|
unsigned field_nb; |
|
/* If the video is frame-encoded, the frame numbers shall be represented by |
|
* even field numbers. |
|
* see SMPTE360M-2004 6.4.2.1.3 Media field number */ |
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
|
field_nb = gxf->nb_fields; |
|
} else { |
|
field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den, |
|
(int64_t)48000*gxf->time_base.num, AV_ROUND_UP); |
|
} |
|
|
|
avio_w8(pb, sc->media_type); |
|
avio_w8(pb, st->index); |
|
avio_wb32(pb, field_nb); |
|
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
|
avio_wb16(pb, 0); |
|
avio_wb16(pb, size / 2); |
|
} else if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) { |
|
int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size); |
|
if (frame_type == AV_PICTURE_TYPE_I) { |
|
avio_w8(pb, 0x0d); |
|
sc->iframes++; |
|
} else if (frame_type == AV_PICTURE_TYPE_B) { |
|
avio_w8(pb, 0x0f); |
|
sc->bframes++; |
|
} else { |
|
avio_w8(pb, 0x0e); |
|
sc->pframes++; |
|
} |
|
avio_wb24(pb, size); |
|
} else if (st->codec->codec_id == AV_CODEC_ID_DVVIDEO) { |
|
avio_w8(pb, size / 4096); |
|
avio_wb24(pb, 0); |
|
} else |
|
avio_wb32(pb, size); |
|
avio_wb32(pb, field_nb); |
|
avio_w8(pb, 1); /* flags */ |
|
avio_w8(pb, 0); /* reserved */ |
|
return 16; |
|
} |
|
|
|
static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
GXFContext *gxf = s->priv_data; |
|
AVIOContext *pb = s->pb; |
|
AVStream *st = s->streams[pkt->stream_index]; |
|
int64_t pos = avio_tell(pb); |
|
int padding = 0; |
|
int packet_start_offset = avio_tell(pb) / 1024; |
|
|
|
gxf_write_packet_header(pb, PKT_MEDIA); |
|
if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */ |
|
padding = 4 - pkt->size % 4; |
|
else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) |
|
padding = GXF_AUDIO_PACKET_SIZE - pkt->size; |
|
gxf_write_media_preamble(s, pkt, pkt->size + padding); |
|
avio_write(pb, pkt->data, pkt->size); |
|
gxf_write_padding(pb, padding); |
|
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
|
if (!(gxf->flt_entries_nb % 500)) { |
|
gxf->flt_entries = av_realloc(gxf->flt_entries, |
|
(gxf->flt_entries_nb+500)*sizeof(*gxf->flt_entries)); |
|
if (!gxf->flt_entries) { |
|
av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n"); |
|
return -1; |
|
} |
|
} |
|
gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset; |
|
gxf->nb_fields += 2; // count fields |
|
} |
|
|
|
updatePacketSize(pb, pos); |
|
|
|
gxf->packet_count++; |
|
if (gxf->packet_count == 100) { |
|
gxf_write_map_packet(s, 0); |
|
gxf->packet_count = 0; |
|
} |
|
|
|
avio_flush(pb); |
|
|
|
return 0; |
|
} |
|
|
|
static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur) |
|
{ |
|
GXFContext *gxf = s->priv_data; |
|
AVPacket *pkt[2] = { cur, next }; |
|
int i, field_nb[2]; |
|
GXFStreamContext *sc[2]; |
|
|
|
for (i = 0; i < 2; i++) { |
|
AVStream *st = s->streams[pkt[i]->stream_index]; |
|
sc[i] = st->priv_data; |
|
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
|
field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den, |
|
(int64_t)48000*gxf->time_base.num, AV_ROUND_UP); |
|
field_nb[i] &= ~1; // compare against even field number because audio must be before video |
|
} else |
|
field_nb[i] = pkt[i]->dts; // dts are field based |
|
} |
|
|
|
return field_nb[1] > field_nb[0] || |
|
(field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order); |
|
} |
|
|
|
static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush) |
|
{ |
|
if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
|
pkt->duration = 2; // enforce 2 fields |
|
return ff_audio_rechunk_interleave(s, out, pkt, flush, |
|
ff_interleave_packet_per_dts, gxf_compare_field_nb); |
|
} |
|
|
|
AVOutputFormat ff_gxf_muxer = { |
|
.name = "gxf", |
|
.long_name = NULL_IF_CONFIG_SMALL("GXF (General eXchange Format)"), |
|
.extensions = "gxf", |
|
.priv_data_size = sizeof(GXFContext), |
|
.audio_codec = AV_CODEC_ID_PCM_S16LE, |
|
.video_codec = AV_CODEC_ID_MPEG2VIDEO, |
|
.write_header = gxf_write_header, |
|
.write_packet = gxf_write_packet, |
|
.write_trailer = gxf_write_trailer, |
|
.interleave_packet = gxf_interleave_packet, |
|
};
|
|
|