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_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_eos_packet(ByteIOContext *pb, GXFContext *ctx)
{
int64_t pos = url_ftell(pb);
gxf_write_packet_header(pb, PKT_EOS);
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_flt_packet(ByteIOContext *pb, GXFContext *ctx)
{
int64_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);
}
static int gxf_write_map_packet(ByteIOContext *pb, GXFContext *ctx)
{
int64_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);
}
static int gxf_write_media_packet(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt)
{
GXFStreamContext *sc = &ctx->streams[pkt->stream_index];
int64_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;
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 == 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_write_umf_packet(ByteIOContext *pb, GXFContext *ctx)
{
int64_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);
}
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);
}