diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/gxfenc.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/gxfenc.c | 828 |
1 files changed, 0 insertions, 828 deletions
diff --git a/contrib/ffmpeg/libavformat/gxfenc.c b/contrib/ffmpeg/libavformat/gxfenc.c deleted file mode 100644 index 39b9ed3e1..000000000 --- a/contrib/ffmpeg/libavformat/gxfenc.c +++ /dev/null @@ -1,828 +0,0 @@ -/* - * GXF muxer. - * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>. - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "avformat.h" -#include "gxf.h" -#include "riff.h" -#include "fifo.h" - -#define GXF_AUDIO_PACKET_SIZE 65536 - -typedef struct GXFStreamContext { - AVCodecContext *codec; - AVFifoBuffer audio_buffer; - uint32_t track_type; - uint32_t sample_size; - uint32_t sample_rate; - uint16_t media_type; - uint16_t media_info; - uint8_t index; - int frame_rate_index; - int lines_index; - int fields; - int iframes; - int pframes; - int bframes; - int p_per_gop; - int b_per_gop; - int first_gop_closed; - int64_t current_dts; - int dts_delay; -} GXFStreamContext; - -typedef struct GXFContext { - uint32_t nb_frames; - uint32_t material_flags; - uint16_t audio_tracks; - uint16_t mpeg_tracks; - int64_t creation_time; - uint32_t umf_start_offset; - uint32_t umf_track_offset; - uint32_t umf_media_offset; - uint32_t umf_user_data_offset; - uint32_t umf_user_data_size; - uint32_t umf_length; - uint16_t umf_track_size; - uint16_t umf_media_size; - int audio_written; - int sample_rate; - int flags; - AVFormatContext *fc; - GXFStreamContext streams[48]; -} GXFContext; - -typedef struct GXF_Lines { - int height; - int index; -} GXF_Lines; - - -/* FIXME check if it is relevant */ -static const GXF_Lines gxf_lines_tab[] = { - { 480, 1 }, /* NTSC */ - { 512, 1 }, /* NTSC + VBI */ - { 576, 2 }, /* PAL */ - { 608, 2 }, /* PAL + VBI */ - { 1080, 4 }, - { 720, 6 }, -}; - -static const AVCodecTag gxf_media_types[] = { - { CODEC_ID_MJPEG , 3 }, /* NTSC */ - { CODEC_ID_MJPEG , 4 }, /* PAL */ - { CODEC_ID_PCM_S24LE , 9 }, - { CODEC_ID_PCM_S16LE , 10 }, - { CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */ - { CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */ - { CODEC_ID_DVVIDEO , 13 }, /* NTSC */ - { CODEC_ID_DVVIDEO , 14 }, /* PAL */ - { CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */ - { CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */ - { CODEC_ID_AC3 , 17 }, - //{ CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */ - { CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */ - { CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */ - { CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */ - { 0, 0 }, -}; - -#define SERVER_PATH "/space/" -#define ES_NAME_PATTERN "ES." - -static int gxf_find_lines_index(GXFStreamContext *ctx) -{ - int i; - - for (i = 0; i < 6; ++i) { - if (ctx->codec->height == gxf_lines_tab[i].height) { - ctx->lines_index = gxf_lines_tab[i].index; - return 0; - } - } - return -1; -} - -static void gxf_write_padding(ByteIOContext *pb, offset_t to_pad) -{ - for (; to_pad > 0; to_pad--) { - put_byte(pb, 0); - } -} - -static offset_t updatePacketSize(ByteIOContext *pb, offset_t pos) -{ - offset_t curpos; - int size; - - size = url_ftell(pb) - pos; - if (size % 4) { - gxf_write_padding(pb, 4 - size % 4); - size = url_ftell(pb) - pos; - } - curpos = url_ftell(pb); - url_fseek(pb, pos + 6, SEEK_SET); - put_be32(pb, size); - url_fseek(pb, curpos, SEEK_SET); - return curpos - pos; -} - -static offset_t updateSize(ByteIOContext *pb, offset_t pos) -{ - offset_t curpos; - - curpos = url_ftell(pb); - url_fseek(pb, pos, SEEK_SET); - put_be16(pb, curpos - pos - 2); - url_fseek(pb, curpos, SEEK_SET); - return curpos - pos; -} - -static void gxf_write_packet_header(ByteIOContext *pb, pkt_type_t type) -{ - put_be32(pb, 0); /* packet leader for synchro */ - put_byte(pb, 1); - put_byte(pb, type); /* map packet */ - put_be32(pb, 0); /* size */ - put_be32(pb, 0); /* reserved */ - put_byte(pb, 0xE1); /* trailer 1 */ - put_byte(pb, 0xE2); /* trailer 2 */ -} - -static int gxf_write_mpeg_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx) -{ - char buffer[1024]; - int size; - - if (ctx->iframes) { - ctx->p_per_gop = ctx->pframes / ctx->iframes; - if (ctx->pframes % ctx->iframes) - ctx->p_per_gop++; - if (ctx->pframes) - ctx->b_per_gop = ctx->bframes / ctx->pframes; - if (ctx->p_per_gop > 9) - ctx->p_per_gop = 9; /* ensure value won't take more than one char */ - if (ctx->b_per_gop > 9) - ctx->b_per_gop = 9; /* ensure value won't take more than one char */ - } - size = snprintf(buffer, 1024, "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n" - "Pix 0\nCf %d\nCg %d\nSl 7\nnl16 %d\nVi 1\nf1 1\n", - (float)ctx->codec->bit_rate, ctx->p_per_gop, ctx->b_per_gop, - ctx->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, ctx->first_gop_closed == 1, - ctx->codec->height / 16); - put_byte(pb, 0x4F); - put_byte(pb, size + 1); - put_buffer(pb, (uint8_t *)buffer, size + 1); - return size + 3; -} - -static int gxf_write_timecode_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx) -{ - /* FIXME implement that */ - put_byte(pb, 0); /* fields */ - put_byte(pb, 0); /* seconds */ - put_byte(pb, 0); /* minutes */ - put_byte(pb, 0); /* flags + hours */ - /* reserved */ - put_be32(pb, 0); - return 8; -} - -static int gxf_write_track_description(ByteIOContext *pb, GXFStreamContext *stream) -{ - offset_t pos; - - /* track description section */ - put_byte(pb, stream->media_type + 0x80); - put_byte(pb, stream->index + 0xC0); - - pos = url_ftell(pb); - put_be16(pb, 0); /* size */ - - /* media file name */ - put_byte(pb, 0x4C); - put_byte(pb, strlen(ES_NAME_PATTERN) + 3); - put_tag(pb, ES_NAME_PATTERN); - put_be16(pb, stream->media_info); - put_byte(pb, 0); - - if (stream->codec->codec_id != CODEC_ID_MPEG2VIDEO) { - /* auxiliary information */ - put_byte(pb, 0x4D); - put_byte(pb, 8); - if (stream->codec->codec_id == CODEC_ID_NONE) - gxf_write_timecode_auxiliary(pb, stream); - else - put_le64(pb, 0); - } - - /* file system version */ - put_byte(pb, 0x4E); - put_byte(pb, 4); - put_be32(pb, 0); - - if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO) - gxf_write_mpeg_auxiliary(pb, stream); - - /* frame rate */ - put_byte(pb, 0x50); - put_byte(pb, 4); - put_be32(pb, stream->frame_rate_index); - - /* lines per frame */ - put_byte(pb, 0x51); - put_byte(pb, 4); - put_be32(pb, stream->lines_index); - - /* fields per frame */ - put_byte(pb, 0x52); - put_byte(pb, 4); - put_be32(pb, stream->fields); - - return updateSize(pb, pos); -} - -static int gxf_write_material_data_section(ByteIOContext *pb, GXFContext *ctx) -{ - offset_t pos; - const char *filename = strrchr(ctx->fc->filename, '/'); - - pos = url_ftell(pb); - put_be16(pb, 0); /* size */ - - /* name */ - if (filename) - filename++; - else - filename = ctx->fc->filename; - put_byte(pb, 0x40); - put_byte(pb, strlen(SERVER_PATH) + strlen(filename) + 1); - put_tag(pb, SERVER_PATH); - put_tag(pb, filename); - put_byte(pb, 0); - - /* first field */ - put_byte(pb, 0x41); - put_byte(pb, 4); - put_be32(pb, 0); - - /* last field */ - put_byte(pb, 0x42); - put_byte(pb, 4); - put_be32(pb, ctx->nb_frames); - - /* reserved */ - put_byte(pb, 0x43); - put_byte(pb, 4); - put_be32(pb, 0); - - put_byte(pb, 0x44); - put_byte(pb, 4); - put_be32(pb, ctx->nb_frames); - - /* estimated size */ - put_byte(pb, 0x45); - put_byte(pb, 4); - put_be32(pb, url_fsize(pb) / 1024); - - return updateSize(pb, pos); -} - -static int gxf_write_track_description_section(ByteIOContext *pb, GXFContext *ctx) -{ - offset_t pos; - int i; - - pos = url_ftell(pb); - put_be16(pb, 0); /* size */ - for (i = 0; i < ctx->fc->nb_streams; ++i) - gxf_write_track_description(pb, &ctx->streams[i]); - return updateSize(pb, pos); -} - -static int gxf_write_map_packet(ByteIOContext *pb, GXFContext *ctx) -{ - offset_t pos = url_ftell(pb); - - gxf_write_packet_header(pb, PKT_MAP); - - /* preamble */ - put_byte(pb, 0xE0); /* version */ - put_byte(pb, 0xFF); /* reserved */ - - gxf_write_material_data_section(pb, ctx); - gxf_write_track_description_section(pb, ctx); - - return updatePacketSize(pb, pos); -} - -#if 0 -static int gxf_write_flt_packet(ByteIOContext *pb, GXFContext *ctx) -{ - offset_t pos = url_ftell(pb); - int i; - - gxf_write_packet_header(pb, PKT_FLT); - - put_le32(pb, 1000); /* number of fields */ - put_le32(pb, 0); /* number of active flt entries */ - - for (i = 0; i < 1000; ++i) { - put_le32(pb, 0); - } - return updatePacketSize(pb, pos); -} -#endif - -static int gxf_write_umf_material_description(ByteIOContext *pb, GXFContext *ctx) -{ - put_le32(pb, ctx->flags); - put_le32(pb, ctx->nb_frames); /* length of the longest track */ - put_le32(pb, ctx->nb_frames); /* length of the shortest track */ - put_le32(pb, 0); /* mark in */ - put_le32(pb, ctx->nb_frames); /* mark out */ - put_le32(pb, 0); /* timecode mark in */ - put_le32(pb, ctx->nb_frames); /* timecode mark out */ - put_le64(pb, ctx->fc->timestamp); /* modification time */ - put_le64(pb, ctx->fc->timestamp); /* creation time */ - put_le16(pb, 0); /* reserved */ - put_le16(pb, 0); /* reserved */ - put_le16(pb, ctx->audio_tracks); - put_le16(pb, 0); /* timecode track count */ - put_le16(pb, 0); /* reserved */ - put_le16(pb, ctx->mpeg_tracks); - return 48; -} - -static int gxf_write_umf_payload(ByteIOContext *pb, GXFContext *ctx) -{ - put_le32(pb, ctx->umf_length); /* total length of the umf data */ - put_le32(pb, 3); /* version */ - put_le32(pb, ctx->fc->nb_streams); - put_le32(pb, ctx->umf_track_offset); /* umf track section offset */ - put_le32(pb, ctx->umf_track_size); - put_le32(pb, ctx->fc->nb_streams); - put_le32(pb, ctx->umf_media_offset); - put_le32(pb, ctx->umf_media_size); - put_le32(pb, ctx->umf_user_data_offset); /* user data offset */ - put_le32(pb, ctx->umf_user_data_size); /* user data size */ - put_le32(pb, 0); /* reserved */ - put_le32(pb, 0); /* reserved */ - return 48; -} - -static int gxf_write_umf_track_description(ByteIOContext *pb, GXFContext *ctx) -{ - offset_t pos = url_ftell(pb); - int tracks[255]={0}; - int i; - - ctx->umf_track_offset = pos - ctx->umf_start_offset; - for (i = 0; i < ctx->fc->nb_streams; ++i) { - AVStream *st = ctx->fc->streams[i]; - GXFStreamContext *sc = &ctx->streams[i]; - int id = 0; - - switch (st->codec->codec_id) { - case CODEC_ID_MPEG1VIDEO: id= 'L'; break; - case CODEC_ID_MPEG2VIDEO: id= 'M'; break; - case CODEC_ID_PCM_S16LE: id= 'A'; break; - case CODEC_ID_DVVIDEO: id= sc->track_type == 6 ? 'E' : 'D'; break; - case CODEC_ID_MJPEG: id= 'V'; break; - default: break; - } - sc->media_info= id << 8; - /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */ - sc->media_info |= '0' + (tracks[id]++); - put_le16(pb, sc->media_info); - put_le16(pb, 1); - } - return url_ftell(pb) - pos; -} - -static int gxf_write_umf_media_mpeg(ByteIOContext *pb, GXFStreamContext *stream) -{ - if (stream->codec->pix_fmt == PIX_FMT_YUV422P) - put_le32(pb, 2); - else - put_le32(pb, 1); /* default to 420 */ - put_le32(pb, stream->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */ - put_le32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */ - put_le32(pb, 1); /* I picture per GOP */ - put_le32(pb, stream->p_per_gop); - put_le32(pb, stream->b_per_gop); - if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO) - put_le32(pb, 2); - else if (stream->codec->codec_id == CODEC_ID_MPEG1VIDEO) - put_le32(pb, 1); - else - put_le32(pb, 0); - put_le32(pb, 0); /* reserved */ - return 32; -} - -static int gxf_write_umf_media_timecode(ByteIOContext *pb, GXFStreamContext *track) -{ - /* FIXME implement */ - put_be32(pb, 0); /* drop frame flag */ - put_be32(pb, 0); /* reserved */ - put_be32(pb, 0); /* reserved */ - put_be32(pb, 0); /* reserved */ - put_be32(pb, 0); /* reserved */ - put_be32(pb, 0); /* reserved */ - put_be32(pb, 0); /* reserved */ - put_be32(pb, 0); /* reserved */ - return 32; -} - -static int gxf_write_umf_media_dv(ByteIOContext *pb, GXFStreamContext *track) -{ - int i; - - for (i = 0; i < 8; i++) { - put_be32(pb, 0); - } - return 32; -} - -static int gxf_write_umf_media_audio(ByteIOContext *pb, GXFStreamContext *track) -{ - put_le64(pb, av_dbl2int(1)); /* sound level to begin to */ - put_le64(pb, av_dbl2int(1)); /* sound level to begin to */ - put_le32(pb, 0); /* number of fields over which to ramp up sound level */ - put_le32(pb, 0); /* number of fields over which to ramp down sound level */ - put_le32(pb, 0); /* reserved */ - put_le32(pb, 0); /* reserved */ - return 32; -} - -#if 0 -static int gxf_write_umf_media_mjpeg(ByteIOContext *pb, GXFStreamContext *track) -{ - put_be64(pb, 0); /* FIXME FLOAT max chroma quant level */ - put_be64(pb, 0); /* FIXME FLOAT max luma quant level */ - put_be64(pb, 0); /* FIXME FLOAT min chroma quant level */ - put_be64(pb, 0); /* FIXME FLOAT min luma quant level */ - return 32; -} -#endif - -static int gxf_write_umf_media_description(ByteIOContext *pb, GXFContext *ctx) -{ - offset_t pos; - int i; - - pos = url_ftell(pb); - ctx->umf_media_offset = pos - ctx->umf_start_offset; - for (i = 0; i < ctx->fc->nb_streams; ++i) { - GXFStreamContext *sc = &ctx->streams[i]; - char buffer[88]; - offset_t startpos, curpos; - int path_size = strlen(ES_NAME_PATTERN); - - memset(buffer, 0, 88); - startpos = url_ftell(pb); - put_le16(pb, 0); /* length */ - put_le16(pb, sc->media_info); - put_le16(pb, 0); /* reserved */ - put_le16(pb, 0); /* reserved */ - put_le32(pb, ctx->nb_frames); - put_le32(pb, 0); /* attributes rw, ro */ - put_le32(pb, 0); /* mark in */ - put_le32(pb, ctx->nb_frames); /* mark out */ - strncpy(buffer, ES_NAME_PATTERN, path_size); - put_buffer(pb, (uint8_t *)buffer, path_size); - put_be16(pb, sc->media_info); - put_buffer(pb, (uint8_t *)buffer + path_size + 2, 88 - path_size - 2); - put_le32(pb, sc->track_type); - put_le32(pb, sc->sample_rate); - put_le32(pb, sc->sample_size); - put_le32(pb, 0); /* reserved */ - switch (sc->codec->codec_id) { - case CODEC_ID_MPEG2VIDEO: - gxf_write_umf_media_mpeg(pb, sc); - break; - case CODEC_ID_PCM_S16LE: - gxf_write_umf_media_audio(pb, sc); - break; - case CODEC_ID_DVVIDEO: - gxf_write_umf_media_dv(pb, sc); - break; - default: - gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */ - } - curpos = url_ftell(pb); - url_fseek(pb, startpos, SEEK_SET); - put_le16(pb, curpos - startpos); - url_fseek(pb, curpos, SEEK_SET); - } - return url_ftell(pb) - pos; -} - -static int gxf_write_umf_user_data(ByteIOContext *pb, GXFContext *ctx) -{ - offset_t pos = url_ftell(pb); - ctx->umf_user_data_offset = pos - ctx->umf_start_offset; - put_le32(pb, 20); - put_le32(pb, 0); - put_le16(pb, 0); - put_le16(pb, 0); - put_le32(pb, 0); - put_byte(pb, 0); - put_byte(pb, 0); - put_byte(pb, 0); - put_byte(pb, 0); - return 20; -} - -static int gxf_write_umf_packet(ByteIOContext *pb, GXFContext *ctx) -{ - offset_t pos = url_ftell(pb); - - gxf_write_packet_header(pb, PKT_UMF); - - /* preamble */ - put_byte(pb, 3); /* first and last (only) packet */ - put_be32(pb, ctx->umf_length); /* data length */ - - ctx->umf_start_offset = url_ftell(pb); - gxf_write_umf_payload(pb, ctx); - gxf_write_umf_material_description(pb, ctx); - ctx->umf_track_size = gxf_write_umf_track_description(pb, ctx); - ctx->umf_media_size = gxf_write_umf_media_description(pb, ctx); - ctx->umf_user_data_size = gxf_write_umf_user_data(pb, ctx); - ctx->umf_length = url_ftell(pb) - ctx->umf_start_offset; - return updatePacketSize(pb, pos); -} - -#define GXF_NODELAY -5000 - -static int gxf_write_header(AVFormatContext *s) -{ - ByteIOContext *pb = &s->pb; - GXFContext *gxf = s->priv_data; - int i; - - gxf->fc = s; - gxf->flags |= 0x00080000; /* material is simple clip */ - for (i = 0; i < s->nb_streams; ++i) { - AVStream *st = s->streams[i]; - GXFStreamContext *sc = &gxf->streams[i]; - - sc->codec = st->codec; - sc->index = i; - sc->media_type = codec_get_tag(gxf_media_types, sc->codec->codec_id); - if (st->codec->codec_type == CODEC_TYPE_AUDIO) { - if (st->codec->codec_id != 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; - av_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 */ - av_fifo_init(&sc->audio_buffer, 3*GXF_AUDIO_PACKET_SIZE); - } else if (sc->codec->codec_type == CODEC_TYPE_VIDEO) { - /* FIXME check from time_base ? */ - if (sc->codec->height == 480 || sc->codec->height == 512) { /* NTSC or NTSC+VBI */ - sc->frame_rate_index = 5; - sc->sample_rate = 60; - gxf->flags |= 0x00000080; - } else { /* assume PAL */ - sc->frame_rate_index = 6; - sc->media_type++; - sc->sample_rate = 50; - gxf->flags |= 0x00000040; - } - gxf->sample_rate = sc->sample_rate; - av_set_pts_info(st, 64, 1, st->codec->time_base.den); - sc->dts_delay = GXF_NODELAY; - if (gxf_find_lines_index(sc) < 0) - sc->lines_index = -1; - sc->sample_size = st->codec->bit_rate; - sc->fields = 2; /* interlaced */ - switch (sc->codec->codec_id) { - case CODEC_ID_MPEG2VIDEO: - sc->first_gop_closed = -1; - sc->track_type = 4; - gxf->mpeg_tracks++; - gxf->flags |= 0x00008000; - break; - case CODEC_ID_DVVIDEO: - if (sc->codec->pix_fmt == PIX_FMT_YUV422P) { - sc->media_type += 2; - sc->track_type = 6; - gxf->flags |= 0x00002000; - } else { - sc->track_type = 5; - gxf->flags |= 0x00001000; - } - break; - default: - av_log(s, AV_LOG_ERROR, "video codec not supported\n"); - return -1; - } - } - } - gxf_write_map_packet(pb, gxf); - //gxf_write_flt_packet(pb, gxf); - gxf_write_umf_packet(pb, gxf); - put_flush_packet(pb); - return 0; -} - -static int gxf_write_eos_packet(ByteIOContext *pb, GXFContext *ctx) -{ - offset_t pos = url_ftell(pb); - - gxf_write_packet_header(pb, PKT_EOS); - return updatePacketSize(pb, pos); -} - -static int gxf_write_trailer(AVFormatContext *s) -{ - ByteIOContext *pb = &s->pb; - GXFContext *gxf = s->priv_data; - offset_t end; - int i; - - for (i = 0; i < s->nb_streams; ++i) { - if (s->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO) { - av_fifo_free(&gxf->streams[i].audio_buffer); - } - if (s->streams[i]->codec->frame_number > gxf->nb_frames) - gxf->nb_frames = 2 * s->streams[i]->codec->frame_number; - } - - gxf_write_eos_packet(pb, gxf); - end = url_ftell(pb); - url_fseek(pb, 0, SEEK_SET); - /* overwrite map and umf packets with new values */ - gxf_write_map_packet(pb, gxf); - //gxf_write_flt_packet(pb, gxf); - gxf_write_umf_packet(pb, gxf); - url_fseek(pb, end, SEEK_SET); - 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(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt, int size) -{ - GXFStreamContext *sc = &ctx->streams[pkt->stream_index]; - int64_t dts = av_rescale(pkt->dts, ctx->sample_rate, sc->codec->time_base.den); - - put_byte(pb, sc->media_type); - put_byte(pb, sc->index); - put_be32(pb, dts); - if (sc->codec->codec_type == CODEC_TYPE_AUDIO) { - put_be16(pb, 0); - put_be16(pb, size / 2); - } else if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO) { - int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size); - if (frame_type == FF_I_TYPE) { - put_byte(pb, 0x0d); - sc->iframes++; - } else if (frame_type == FF_B_TYPE) { - put_byte(pb, 0x0f); - sc->bframes++; - } else { - put_byte(pb, 0x0e); - sc->pframes++; - } - put_be24(pb, size); - } else if (sc->codec->codec_id == CODEC_ID_DVVIDEO) { - put_byte(pb, size / 4096); - put_be24(pb, 0); - } else - put_be32(pb, size); - put_be32(pb, dts); - put_byte(pb, 1); /* flags */ - put_byte(pb, 0); /* reserved */ - return 16; -} - -static int gxf_write_media_packet(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt) -{ - GXFStreamContext *sc = &ctx->streams[pkt->stream_index]; - offset_t pos = url_ftell(pb); - int padding = 0; - - gxf_write_packet_header(pb, PKT_MEDIA); - if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */ - padding = 4 - pkt->size % 4; - else if (sc->codec->codec_type == CODEC_TYPE_AUDIO) - padding = GXF_AUDIO_PACKET_SIZE - pkt->size; - gxf_write_media_preamble(pb, ctx, pkt, pkt->size + padding); - put_buffer(pb, pkt->data, pkt->size); - gxf_write_padding(pb, padding); - return updatePacketSize(pb, pos); -} - -static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt) -{ - GXFContext *gxf = s->priv_data; - - gxf_write_media_packet(&s->pb, gxf, pkt); - put_flush_packet(&s->pb); - return 0; -} - -static int gxf_new_audio_packet(GXFContext *gxf, GXFStreamContext *sc, AVPacket *pkt, int flush) -{ - int size = flush ? av_fifo_size(&sc->audio_buffer) : GXF_AUDIO_PACKET_SIZE; - - if (!size) - return 0; - av_new_packet(pkt, size); - av_fifo_read(&sc->audio_buffer, pkt->data, size); - pkt->stream_index = sc->index; - pkt->dts = sc->current_dts; - sc->current_dts += size / 2; /* we only support 16 bit pcm mono for now */ - return size; -} - -static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush) -{ - GXFContext *gxf = s->priv_data; - AVPacket new_pkt; - int i; - - for (i = 0; i < s->nb_streams; i++) { - AVStream *st = s->streams[i]; - GXFStreamContext *sc = &gxf->streams[i]; - if (st->codec->codec_type == CODEC_TYPE_AUDIO) { - if (pkt && pkt->stream_index == i) { - av_fifo_write(&sc->audio_buffer, pkt->data, pkt->size); - pkt = NULL; - } - if (flush || av_fifo_size(&sc->audio_buffer) >= GXF_AUDIO_PACKET_SIZE) { - if (!pkt && gxf_new_audio_packet(gxf, sc, &new_pkt, flush) > 0) { - pkt = &new_pkt; - break; /* add pkt right now into list */ - } - } - } else if (pkt && pkt->stream_index == i) { - if (sc->dts_delay == GXF_NODELAY) /* adjust dts if needed */ - sc->dts_delay = pkt->dts; - pkt->dts -= sc->dts_delay; - } - } - return av_interleave_packet_per_dts(s, out, pkt, flush); -} - -AVOutputFormat gxf_muxer = { - "gxf", - "GXF format", - NULL, - "gxf", - sizeof(GXFContext), - CODEC_ID_PCM_S16LE, - CODEC_ID_MPEG2VIDEO, - gxf_write_header, - gxf_write_packet, - gxf_write_trailer, - 0, - NULL, - gxf_interleave_packet, -}; |