36 #define MAX_PAYLOAD_SIZE 4096
107 put_bits(&pb, 3, (uint32_t)((timestamp >> 30) & 0x07));
109 put_bits(&pb, 15, (uint32_t)((timestamp >> 15) & 0x7fff));
111 put_bits(&pb, 15, (uint32_t)((timestamp) & 0x7fff));
129 int only_for_stream_id)
132 int size, i, private_stream_coded,
id;
191 int P_STD_max_video = 0;
192 int P_STD_max_mpeg_audio = 0;
193 int P_STD_max_mpeg_PS1 = 0;
201 }
else if (
id >= 0xc0 &&
id <= 0xc7 &&
204 }
else if (
id == 0xe0 &&
214 put_bits(&pb, 13, P_STD_max_video / 1024);
217 if (P_STD_max_mpeg_audio == 0)
218 P_STD_max_mpeg_audio = 4096;
222 put_bits(&pb, 13, P_STD_max_mpeg_audio / 128);
228 put_bits(&pb, 13, P_STD_max_mpeg_PS1 / 128);
237 private_stream_coded = 0;
244 if (!s->
is_vcd || stream->
id == only_for_stream_id ||
245 only_for_stream_id == 0) {
249 if (private_stream_coded)
251 private_stream_coded = 1;
272 buf[4] = (size - 6) >> 8;
273 buf[5] = (size - 6) & 0xff;
280 int buf_index, i, private_stream_coded;
288 private_stream_coded = 0;
291 if (stream->
id < 0xc0) {
292 if (private_stream_coded)
294 private_stream_coded = 1;
304 int bitrate, i, mpa_id, mpv_id, mps_id, ac3_id, dts_id, lpcm_id, j;
355 stream->
id = ac3_id++;
357 stream->
id = dts_id++;
359 stream->
id = lpcm_id++;
360 for (j = 0; j < 4; j++) {
373 stream->
id = mpa_id++;
382 stream->
id = mpv_id++;
387 "VBV buffer size not set, muxing may fail\n");
394 stream->
id = mps_id++;
418 codec_rate = (1 << 21) * 8 * 50 / ctx->
nb_streams;
420 bitrate += codec_rate;
423 audio_bitrate += codec_rate;
425 video_bitrate += codec_rate;
431 bitrate += bitrate / 20;
433 s->
mux_rate = (bitrate + (8 * 50) - 1) / (8 * 50);
437 double overhead_rate;
457 overhead_rate = ((audio_bitrate / 8.0) / 2279) * (2324 - 2279);
458 overhead_rate += ((video_bitrate / 8.0) / 2294) * (2324 - 2294);
503 avio_w8(pb, (
id << 4) | (((timestamp >> 30) & 0x07) << 1) | 1);
504 avio_wb16(pb, (uint16_t)((((timestamp >> 15) & 0x7fff) << 1) | 1));
505 avio_wb16(pb, (uint16_t)((((timestamp) & 0x7fff) << 1) | 1));
516 int64_t full_pad_bytes;
547 for (i = 0; i < packet_bytes; i++)
560 pkt_desc = pkt_desc->
next;
568 int64_t pts, int64_t dts, int64_t scr,
int trailer_size)
573 int size, payload_size, startcode,
id, stuffing_size, i, header_len;
576 int zero_trail_bytes = 0;
577 int pad_packet_bytes = 0;
580 int general_pack = 0;
585 av_dlog(ctx,
"packet ID=%2x PTS=%0.3f\n",
id, pts / 90000.0);
606 int PES_bytes_to_fill = s->
packet_size - size - 10;
610 PES_bytes_to_fill -= 5 + 5;
612 PES_bytes_to_fill -= 5;
624 for (i = 0; i < 979; i++)
630 for (i = 0; i < 1017; i++)
633 memset(buffer, 0, 128);
645 pad_packet_bytes = PES_bytes_to_fill -
664 zero_trail_bytes += 20;
677 pad_packet_bytes = packet_size - zero_trail_bytes;
680 packet_size -= pad_packet_bytes + zero_trail_bytes;
682 if (packet_size > 0) {
705 payload_size = packet_size - header_len;
715 startcode = 0x100 +
id;
722 int timestamp_len = 0;
726 timestamp_len += s->
is_mpeg2 ? 5 : 4;
729 header_len -= timestamp_len;
731 pad_packet_bytes += timestamp_len;
732 packet_size -= timestamp_len;
734 payload_size += timestamp_len;
736 stuffing_size += timestamp_len;
737 if (payload_size > trailer_size)
738 stuffing_size += payload_size - trailer_size;
742 if (pad_packet_bytes > 0 && pad_packet_bytes <= 7) {
743 packet_size += pad_packet_bytes;
744 payload_size += pad_packet_bytes;
745 if (stuffing_size < 0)
746 stuffing_size = pad_packet_bytes;
748 stuffing_size += pad_packet_bytes;
749 pad_packet_bytes = 0;
752 if (stuffing_size < 0)
757 stuffing_size += payload_size % stream->
lpcm_align;
760 if (stuffing_size > 16) {
761 pad_packet_bytes += stuffing_size;
762 packet_size -= stuffing_size;
763 payload_size -= stuffing_size;
767 nb_frames =
get_nb_frames(ctx, stream, payload_size - stuffing_size);
774 for (i = 0; i < stuffing_size; i++)
796 avio_w8(ctx->
pb, header_len - 3 + stuffing_size);
798 if (pes_flags & 0x80)
800 if (pes_flags & 0x40)
803 if (pes_flags & 0x01) {
830 for (i = 0; i < stuffing_size; i++)
843 }
else if (
id >= 0x40) {
853 payload_size - stuffing_size,
861 if (pad_packet_bytes > 0)
864 for (i = 0; i < zero_trail_bytes; i++)
877 return payload_size - stuffing_size;
915 scr > pkt_desc->
dts) {
919 "buffer underflow i=%d bufi=%d size=%d\n",
937 int i, avail_space = 0, es_size, trailer_size;
939 int best_score = INT_MIN;
940 int ignore_constraints = 0;
961 assert(avail_data > 0);
963 if (space < s->packet_size && !ignore_constraints)
966 if (next_pkt && next_pkt->
dts - scr > max_delay)
969 if (rel_space > best_score) {
970 best_score = rel_space;
977 int64_t best_dts = INT64_MAX;
983 if (pkt_desc && pkt_desc->
dts < best_dts)
984 best_dts = pkt_desc->
dts;
987 av_dlog(ctx,
"bumping scr, scr:%f, dts:%f\n",
988 scr / 90000.0, best_dts / 90000.0);
989 if (best_dts == INT64_MAX)
992 if (scr >= best_dts + 1 && !ignore_constraints) {
994 "packet too large, ignoring buffer limits to mux it\n");
995 ignore_constraints = 1;
997 scr =
FFMAX(best_dts + 1, scr);
1003 assert(best_i >= 0);
1010 assert(avail_space >= s->
packet_size || ignore_constraints);
1017 timestamp_packet = timestamp_packet->
next;
1020 if (timestamp_packet) {
1021 av_dlog(ctx,
"dts:%f pts:%f scr:%f stream:%d\n",
1022 timestamp_packet->
dts / 90000.0,
1023 timestamp_packet->
pts / 90000.0,
1024 scr / 90000.0, best_i);
1026 timestamp_packet->
dts, scr, trailer_size);
1091 av_dlog(ctx,
"dts:%f pts:%f flags:%d stream:%d nopts:%d\n",
1092 dts / 90000.0, pts / 90000.0, pkt->
flags,
1098 pkt_desc->
pts = pts;
1099 pkt_desc->
dts = dts;
1157 #define OFFSET(x) offsetof(MpegMuxContext, x)
1158 #define E AV_OPT_FLAG_ENCODING_PARAM
1161 {
"preload",
"Initial demux-decode delay in microseconds.",
OFFSET(preload),
AV_OPT_TYPE_INT, { .i64 = 500000 }, 0, INT_MAX,
E },
1165 #define MPEGENC_CLASS(flavor) \
1166 static const AVClass flavor ## _class = { \
1167 .class_name = #flavor " muxer", \
1168 .item_name = av_default_item_name, \
1169 .version = LIBAVUTIL_VERSION_INT, \
1170 .option = options, \
1173 #if CONFIG_MPEG1SYSTEM_MUXER
1178 .mime_type =
"video/mpeg",
1179 .extensions =
"mpg,mpeg",
1186 .priv_class = &mpeg_class,
1190 #if CONFIG_MPEG1VCD_MUXER
1195 .mime_type =
"video/mpeg",
1202 .priv_class = &vcd_class,
1206 #if CONFIG_MPEG2VOB_MUXER
1211 .mime_type =
"video/mpeg",
1212 .extensions =
"vob",
1219 .priv_class = &vob_class,
1224 #if CONFIG_MPEG2SVCD_MUXER
1229 .mime_type =
"video/mpeg",
1230 .extensions =
"vob",
1237 .priv_class = &svcd_class,
1242 #if CONFIG_MPEG2DVD_MUXER
1247 .mime_type =
"video/mpeg",
1248 .extensions =
"dvd",
1255 .priv_class = &dvd_class,
static void av_unused put_bits32(PutBitContext *s, uint32_t value)
Write exactly 32 bits into a bitstream.
static int put_pack_header(AVFormatContext *ctx, uint8_t *buf, int64_t timestamp)
static const AVOption options[]
PacketDesc ** next_packet
static int remove_decoded_packets(AVFormatContext *ctx, int64_t scr)
static av_cold int mpeg_mux_init(AVFormatContext *ctx)
#define AV_LOG_WARNING
Something somehow does not look correct.
static int get_system_header_size(AVFormatContext *ctx)
static const int lpcm_freq_tab[4]
static int get_nb_frames(AVFormatContext *ctx, StreamInfo *stream, int len)
int64_t vcd_padding_bytes_written
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic?ac->func_descr_generic:ac->func_descr)
double vcd_padding_bitrate
Macro definitions for various function/variable attributes.
int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int(*func)(void *, void *, int))
Feed data from a user-supplied callback to an AVFifoBuffer.
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
static int output_packet(AVFormatContext *ctx, int flush)
static int flush_packet(AVFormatContext *ctx, int stream_index, int64_t pts, int64_t dts, int64_t scr, int trailer_size)
AVOutputFormat ff_mpeg2svcd_muxer
AVStream ** streams
A list of all streams in the file.
#define SYSTEM_HEADER_START_CODE
PacketDesc * predecode_packet
void av_fifo_free(AVFifoBuffer *f)
Free an AVFifoBuffer.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
static int get_vcd_padding_size(AVFormatContext *ctx, int64_t pts)
struct AVOutputFormat * oformat
The output container format.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define MPEGENC_CLASS(flavor)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static uint8_t * put_bits_ptr(PutBitContext *s)
Return the pointer to the byte where the bitstream writer will put the next bit.
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void(*func)(void *, void *, int))
Feed data from an AVFifoBuffer to a user-supplied callback.
int rc_max_rate
maximum bitrate
void av_log(void *avcl, int level, const char *fmt,...)
static void put_bits(PutBitContext *s, int n, unsigned int value)
Write up to 31 bits into a bitstream.
int flags
A combination of AV_PKT_FLAG values.
AVCodecContext * codec
Codec context associated with this stream.
int rc_buffer_size
decoder bitstream buffer size
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
static void put_timestamp(AVIOContext *pb, int id, int64_t timestamp)
int bit_rate
the average bitrate
int void avio_flush(AVIOContext *s)
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
#define AV_TIME_BASE
Internal time base represented as integer.
AVOutputFormat ff_mpeg1vcd_muxer
static void put_padding_packet(AVFormatContext *ctx, AVIOContext *pb, int packet_bytes)
preferred ID for MPEG-1/2 video decoding
if(ac->has_optimized_func)
enum AVMediaType codec_type
static void put_vcd_padding_sector(AVFormatContext *ctx)
static int mpeg_mux_end(AVFormatContext *ctx)
int sample_rate
samples per second
AVIOContext * pb
I/O context.
int av_fifo_realloc2(AVFifoBuffer *f, unsigned int new_size)
Resize an AVFifoBuffer.
void avio_w8(AVIOContext *s, int b)
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
a very simple circular buffer FIFO implementation
Describe the class of an AVClass context structure.
AVOutputFormat ff_mpeg2dvd_muxer
PacketDesc * premux_packet
void avio_wb16(AVIOContext *s, unsigned int val)
int av_fifo_size(AVFifoBuffer *f)
Return the amount of data in bytes in the AVFifoBuffer, that is the amount of data you can read from ...
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
static av_cold void flush(AVCodecContext *avctx)
Flush (reset) the frame ID after seeking.
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
AVFifoBuffer * av_fifo_alloc(unsigned int size)
Initialize an AVFifoBuffer.
int channels
number of audio channels
void * priv_data
Format private data.
static void write_header(FFV1Context *f)
static int mpeg_mux_write_packet(AVFormatContext *ctx, AVPacket *pkt)
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
void avio_wb32(AVIOContext *s, unsigned int val)
static int put_system_header(AVFormatContext *ctx, uint8_t *buf, int only_for_stream_id)
This structure stores compressed data.
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
#define AV_NOPTS_VALUE
Undefined timestamp value.
AVOutputFormat ff_mpeg2vob_muxer