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Diffstat (limited to 'ffmpeg1/libavformat/gxfenc.c')
-rw-r--r--ffmpeg1/libavformat/gxfenc.c999
1 files changed, 999 insertions, 0 deletions
diff --git a/ffmpeg1/libavformat/gxfenc.c b/ffmpeg1/libavformat/gxfenc.c
new file mode 100644
index 0000000..28acb74
--- /dev/null
+++ b/ffmpeg1/libavformat/gxfenc.c
@@ -0,0 +1,999 @@
+/*
+ * 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 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.
+ *
+ * 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/avassert.h"
+#include "libavutil/intfloat.h"
+#include "libavutil/opt.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/timecode.h"
+#include "avformat.h"
+#include "internal.h"
+#include "gxf.h"
+#include "audiointerleave.h"
+
+#define GXF_AUDIO_PACKET_SIZE 65536
+
+#define GXF_TIMECODE(c, d, h, m, s, f) \
+ ((c) << 30 | (d) << 29 | (h) << 24 | (m) << 16 | (s) << 8 | (f))
+
+typedef struct GXFTimecode{
+ int hh;
+ int mm;
+ int ss;
+ int ff;
+ int color;
+ int drop;
+} GXFTimecode;
+
+typedef struct GXFStreamContext {
+ AudioInterleaveContext aic;
+ uint32_t track_type;
+ uint32_t sample_size;
+ uint32_t sample_rate;
+ uint16_t media_type;
+ uint16_t media_info;
+ int frame_rate_index;
+ int lines_index;
+ int fields;
+ int iframes;
+ int pframes;
+ int bframes;
+ int p_per_gop;
+ int b_per_i_or_p; ///< number of B frames per I frame or P frame
+ int first_gop_closed;
+ unsigned order; ///< interleaving order
+} GXFStreamContext;
+
+typedef struct GXFContext {
+ AVClass *av_class;
+ uint32_t nb_fields;
+ 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_length;
+ uint16_t umf_track_size;
+ uint16_t umf_media_size;
+ AVRational time_base;
+ int flags;
+ GXFStreamContext timecode_track;
+ unsigned *flt_entries; ///< offsets of packets /1024, starts after 2nd video field
+ unsigned flt_entries_nb;
+ uint64_t *map_offsets; ///< offset of map packets
+ unsigned map_offsets_nb;
+ unsigned packet_count;
+ GXFTimecode tc;
+} GXFContext;
+
+static const struct {
+ int height, index;
+} 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[] = {
+ { AV_CODEC_ID_MJPEG , 3 }, /* NTSC */
+ { AV_CODEC_ID_MJPEG , 4 }, /* PAL */
+ { AV_CODEC_ID_PCM_S24LE , 9 },
+ { AV_CODEC_ID_PCM_S16LE , 10 },
+ { AV_CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
+ { AV_CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
+ { AV_CODEC_ID_DVVIDEO , 13 }, /* NTSC */
+ { AV_CODEC_ID_DVVIDEO , 14 }, /* PAL */
+ { AV_CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
+ { AV_CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
+ { AV_CODEC_ID_AC3 , 17 },
+ //{ AV_CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
+ { AV_CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
+ { AV_CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
+ { AV_CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
+ { AV_CODEC_ID_NONE, 0 },
+};
+
+#define SERVER_PATH "EXT:/PDR/default/"
+#define ES_NAME_PATTERN "EXT:/PDR/default/ES."
+
+static int gxf_find_lines_index(AVStream *st)
+{
+ GXFStreamContext *sc = st->priv_data;
+ int i;
+
+ for (i = 0; i < 6; ++i) {
+ if (st->codec->height == gxf_lines_tab[i].height) {
+ sc->lines_index = gxf_lines_tab[i].index;
+ return 0;
+ }
+ }
+ return -1;
+}
+
+static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
+{
+ for (; to_pad > 0; to_pad--) {
+ avio_w8(pb, 0);
+ }
+}
+
+static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
+{
+ int64_t curpos;
+ int size;
+
+ size = avio_tell(pb) - pos;
+ if (size % 4) {
+ gxf_write_padding(pb, 4 - size % 4);
+ size = avio_tell(pb) - pos;
+ }
+ curpos = avio_tell(pb);
+ avio_seek(pb, pos + 6, SEEK_SET);
+ avio_wb32(pb, size);
+ avio_seek(pb, curpos, SEEK_SET);
+ return curpos - pos;
+}
+
+static int64_t updateSize(AVIOContext *pb, int64_t pos)
+{
+ int64_t curpos;
+
+ curpos = avio_tell(pb);
+ avio_seek(pb, pos, SEEK_SET);
+ avio_wb16(pb, curpos - pos - 2);
+ avio_seek(pb, curpos, SEEK_SET);
+ return curpos - pos;
+}
+
+static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
+{
+ avio_wb32(pb, 0); /* packet leader for synchro */
+ avio_w8(pb, 1);
+ avio_w8(pb, type); /* map packet */
+ avio_wb32(pb, 0); /* size */
+ avio_wb32(pb, 0); /* reserved */
+ avio_w8(pb, 0xE1); /* trailer 1 */
+ avio_w8(pb, 0xE2); /* trailer 2 */
+}
+
+static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
+{
+ GXFStreamContext *sc = st->priv_data;
+ char buffer[1024];
+ int size, starting_line;
+
+ if (sc->iframes) {
+ sc->p_per_gop = sc->pframes / sc->iframes;
+ if (sc->pframes % sc->iframes)
+ sc->p_per_gop++;
+ if (sc->pframes) {
+ sc->b_per_i_or_p = sc->bframes / sc->pframes;
+ if (sc->bframes % sc->pframes)
+ sc->b_per_i_or_p++;
+ }
+ if (sc->p_per_gop > 9)
+ sc->p_per_gop = 9; /* ensure value won't take more than one char */
+ if (sc->b_per_i_or_p > 9)
+ sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */
+ }
+ if (st->codec->height == 512 || st->codec->height == 608)
+ starting_line = 7; // VBI
+ else if (st->codec->height == 480)
+ starting_line = 20;
+ else
+ starting_line = 23; // default PAL
+
+ size = snprintf(buffer, sizeof(buffer), "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
+ "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n",
+ (float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
+ st->codec->pix_fmt == AV_PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
+ starting_line, (st->codec->height + 15) / 16);
+ av_assert0(size < sizeof(buffer));
+ avio_w8(pb, TRACK_MPG_AUX);
+ avio_w8(pb, size + 1);
+ avio_write(pb, (uint8_t *)buffer, size + 1);
+ return size + 3;
+}
+
+static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
+{
+ uint32_t timecode = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
+ gxf->tc.hh, gxf->tc.mm,
+ gxf->tc.ss, gxf->tc.ff);
+
+ avio_wl32(pb, timecode);
+ /* reserved */
+ avio_wl32(pb, 0);
+ return 8;
+}
+
+static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
+{
+ GXFContext *gxf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int64_t pos;
+ int mpeg = sc->track_type == 4 || sc->track_type == 9;
+
+ /* track description section */
+ avio_w8(pb, sc->media_type + 0x80);
+ avio_w8(pb, index + 0xC0);
+
+ pos = avio_tell(pb);
+ avio_wb16(pb, 0); /* size */
+
+ /* media file name */
+ avio_w8(pb, TRACK_NAME);
+ avio_w8(pb, strlen(ES_NAME_PATTERN) + 3);
+ avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1);
+ avio_wb16(pb, sc->media_info);
+ avio_w8(pb, 0);
+
+ if (!mpeg) {
+ /* auxiliary information */
+ avio_w8(pb, TRACK_AUX);
+ avio_w8(pb, 8);
+ if (sc->track_type == 3)
+ gxf_write_timecode_auxiliary(pb, gxf);
+ else
+ avio_wl64(pb, 0);
+ }
+
+ /* file system version */
+ avio_w8(pb, TRACK_VER);
+ avio_w8(pb, 4);
+ avio_wb32(pb, 0);
+
+ if (mpeg)
+ gxf_write_mpeg_auxiliary(pb, s->streams[index]);
+
+ /* frame rate */
+ avio_w8(pb, TRACK_FPS);
+ avio_w8(pb, 4);
+ avio_wb32(pb, sc->frame_rate_index);
+
+ /* lines per frame */
+ avio_w8(pb, TRACK_LINES);
+ avio_w8(pb, 4);
+ avio_wb32(pb, sc->lines_index);
+
+ /* fields per frame */
+ avio_w8(pb, TRACK_FPF);
+ avio_w8(pb, 4);
+ avio_wb32(pb, sc->fields);
+
+ return updateSize(pb, pos);
+}
+
+static int gxf_write_material_data_section(AVFormatContext *s)
+{
+ GXFContext *gxf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int64_t pos;
+ int len;
+ const char *filename = strrchr(s->filename, '/');
+
+ pos = avio_tell(pb);
+ avio_wb16(pb, 0); /* size */
+
+ /* name */
+ if (filename)
+ filename++;
+ else
+ filename = s->filename;
+ len = strlen(filename);
+
+ avio_w8(pb, MAT_NAME);
+ avio_w8(pb, strlen(SERVER_PATH) + len + 1);
+ avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
+ avio_write(pb, filename, len);
+ avio_w8(pb, 0);
+
+ /* first field */
+ avio_w8(pb, MAT_FIRST_FIELD);
+ avio_w8(pb, 4);
+ avio_wb32(pb, 0);
+
+ /* last field */
+ avio_w8(pb, MAT_LAST_FIELD);
+ avio_w8(pb, 4);
+ avio_wb32(pb, gxf->nb_fields);
+
+ /* reserved */
+ avio_w8(pb, MAT_MARK_IN);
+ avio_w8(pb, 4);
+ avio_wb32(pb, 0);
+
+ avio_w8(pb, MAT_MARK_OUT);
+ avio_w8(pb, 4);
+ avio_wb32(pb, gxf->nb_fields);
+
+ /* estimated size */
+ avio_w8(pb, MAT_SIZE);
+ avio_w8(pb, 4);
+ avio_wb32(pb, avio_size(pb) / 1024);
+
+ return updateSize(pb, pos);
+}
+
+static int gxf_write_track_description_section(AVFormatContext *s)
+{
+ GXFContext *gxf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int64_t pos;
+ int i;
+
+ pos = avio_tell(pb);
+ avio_wb16(pb, 0); /* size */
+ for (i = 0; i < s->nb_streams; ++i)
+ gxf_write_track_description(s, s->streams[i]->priv_data, i);
+
+ gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);
+
+ return updateSize(pb, pos);
+}
+
+static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
+{
+ GXFContext *gxf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int64_t pos = avio_tell(pb);
+
+ if (!rewrite) {
+ if (!(gxf->map_offsets_nb % 30)) {
+ gxf->map_offsets = av_realloc_f(gxf->map_offsets,
+ sizeof(*gxf->map_offsets),
+ gxf->map_offsets_nb+30);
+ if (!gxf->map_offsets) {
+ av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
+ return -1;
+ }
+ }
+ gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
+ }
+
+ gxf_write_packet_header(pb, PKT_MAP);
+
+ /* preamble */
+ avio_w8(pb, 0xE0); /* version */
+ avio_w8(pb, 0xFF); /* reserved */
+
+ gxf_write_material_data_section(s);
+ gxf_write_track_description_section(s);
+
+ return updatePacketSize(pb, pos);
+}
+
+static int gxf_write_flt_packet(AVFormatContext *s)
+{
+ GXFContext *gxf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int64_t pos = avio_tell(pb);
+ int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
+ int flt_entries = gxf->nb_fields / fields_per_flt;
+ int i = 0;
+
+ gxf_write_packet_header(pb, PKT_FLT);
+
+ avio_wl32(pb, fields_per_flt); /* number of fields */
+ avio_wl32(pb, flt_entries); /* number of active flt entries */
+
+ if (gxf->flt_entries) {
+ for (i = 0; i < flt_entries; i++)
+ avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
+ }
+
+ for (; i < 1000; i++)
+ avio_wl32(pb, 0);
+
+ return updatePacketSize(pb, pos);
+}
+
+static int gxf_write_umf_material_description(AVFormatContext *s)
+{
+ GXFContext *gxf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
+ int64_t timestamp = 0;
+ AVDictionaryEntry *t;
+ uint64_t nb_fields;
+ uint32_t timecode_in; // timecode at mark in
+ uint32_t timecode_out; // timecode at mark out
+
+ if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
+ timestamp = ff_iso8601_to_unix_time(t->value);
+
+ timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
+ gxf->tc.hh, gxf->tc.mm,
+ gxf->tc.ss, gxf->tc.ff);
+
+ nb_fields = gxf->nb_fields +
+ gxf->tc.hh * (timecode_base * 3600) +
+ gxf->tc.mm * (timecode_base * 60) +
+ gxf->tc.ss * timecode_base +
+ gxf->tc.ff;
+
+ timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
+ nb_fields / (timecode_base * 3600) % 24,
+ nb_fields / (timecode_base * 60) % 60,
+ nb_fields / timecode_base % 60,
+ nb_fields % timecode_base);
+
+ avio_wl32(pb, gxf->flags);
+ avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
+ avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
+ avio_wl32(pb, 0); /* mark in */
+ avio_wl32(pb, gxf->nb_fields); /* mark out */
+ avio_wl32(pb, timecode_in); /* timecode mark in */
+ avio_wl32(pb, timecode_out); /* timecode mark out */
+ avio_wl64(pb, timestamp); /* modification time */
+ avio_wl64(pb, timestamp); /* creation time */
+ avio_wl16(pb, 0); /* reserved */
+ avio_wl16(pb, 0); /* reserved */
+ avio_wl16(pb, gxf->audio_tracks);
+ avio_wl16(pb, 1); /* timecode track count */
+ avio_wl16(pb, 0); /* reserved */
+ avio_wl16(pb, gxf->mpeg_tracks);
+ return 48;
+}
+
+static int gxf_write_umf_payload(AVFormatContext *s)
+{
+ GXFContext *gxf = s->priv_data;
+ AVIOContext *pb = s->pb;
+
+ avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
+ avio_wl32(pb, 3); /* version */
+ avio_wl32(pb, s->nb_streams+1);
+ avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
+ avio_wl32(pb, gxf->umf_track_size);
+ avio_wl32(pb, s->nb_streams+1);
+ avio_wl32(pb, gxf->umf_media_offset);
+ avio_wl32(pb, gxf->umf_media_size);
+ avio_wl32(pb, gxf->umf_length); /* user data offset */
+ avio_wl32(pb, 0); /* user data size */
+ avio_wl32(pb, 0); /* reserved */
+ avio_wl32(pb, 0); /* reserved */
+ return 48;
+}
+
+static int gxf_write_umf_track_description(AVFormatContext *s)
+{
+ AVIOContext *pb = s->pb;
+ GXFContext *gxf = s->priv_data;
+ int64_t pos = avio_tell(pb);
+ int i;
+
+ gxf->umf_track_offset = pos - gxf->umf_start_offset;
+ for (i = 0; i < s->nb_streams; ++i) {
+ GXFStreamContext *sc = s->streams[i]->priv_data;
+ avio_wl16(pb, sc->media_info);
+ avio_wl16(pb, 1);
+ }
+
+ avio_wl16(pb, gxf->timecode_track.media_info);
+ avio_wl16(pb, 1);
+
+ return avio_tell(pb) - pos;
+}
+
+static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
+{
+ GXFStreamContext *sc = st->priv_data;
+
+ if (st->codec->pix_fmt == AV_PIX_FMT_YUV422P)
+ avio_wl32(pb, 2);
+ else
+ avio_wl32(pb, 1); /* default to 420 */
+ avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
+ avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
+ avio_wl32(pb, 1); /* I picture per GOP */
+ avio_wl32(pb, sc->p_per_gop);
+ avio_wl32(pb, sc->b_per_i_or_p);
+ if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO)
+ avio_wl32(pb, 2);
+ else if (st->codec->codec_id == AV_CODEC_ID_MPEG1VIDEO)
+ avio_wl32(pb, 1);
+ else
+ avio_wl32(pb, 0);
+ avio_wl32(pb, 0); /* reserved */
+ return 32;
+}
+
+static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
+{
+ avio_wl32(pb, drop); /* drop frame */
+ avio_wl32(pb, 0); /* reserved */
+ avio_wl32(pb, 0); /* reserved */
+ avio_wl32(pb, 0); /* reserved */
+ avio_wl32(pb, 0); /* reserved */
+ avio_wl32(pb, 0); /* reserved */
+ avio_wl32(pb, 0); /* reserved */
+ avio_wl32(pb, 0); /* reserved */
+ return 32;
+}
+
+static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc)
+{
+ int i;
+
+ 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, gxf->tc.drop);
+ 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_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
+{
+ char c;
+
+ if (sscanf(tcstr, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) {
+ av_log(s, AV_LOG_ERROR, "unable to parse timecode, "
+ "syntax: hh:mm:ss[:;.]ff\n");
+ return -1;
+ }
+
+ tc->color = 0;
+ tc->drop = c != ':';
+
+ if (fields == 2)
+ tc->ff = tc->ff * 2;
+
+ return 0;
+}
+
+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;
+ AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
+
+ if (!pb->seekable) {
+ av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome\n");
+ 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;
+ }
+ if (!tcr)
+ tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
+ 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 == AV_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;
+
+ if (tcr && vsc)
+ gxf_init_timecode(s, &gxf->tc, tcr->value, vsc->fields);
+
+ 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_f(gxf->flt_entries,
+ sizeof(*gxf->flt_entries),
+ gxf->flt_entries_nb+500);
+ 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,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 21:44:24 +0000