/*
- * MPEG1/2 mux/demux
+ * MPEG1/2 muxer and demuxer
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * 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 "bitstream.h"
+#include "fifo.h"
#define MAX_PAYLOAD_SIZE 4096
//#define DEBUG_SEEK
#undef NDEBUG
#include <assert.h>
+typedef struct PacketDesc {
+ int64_t pts;
+ int64_t dts;
+ int size;
+ int unwritten_size;
+ int flags;
+ struct PacketDesc *next;
+} PacketDesc;
+
typedef struct {
- uint8_t buffer[MAX_PAYLOAD_SIZE];
- int buffer_ptr;
- int nb_frames; /* number of starting frame encountered (AC3) */
- int frame_start_offset; /* starting offset of the frame + 1 (0 if none) */
+ AVFifoBuffer fifo;
uint8_t id;
int max_buffer_size; /* in bytes */
+ int buffer_index;
+ PacketDesc *predecode_packet;
+ PacketDesc *premux_packet;
+ PacketDesc **next_packet;
int packet_number;
- int64_t start_pts;
- int64_t start_dts;
uint8_t lpcm_header[3];
int lpcm_align;
+ int bytes_to_iframe;
+ int align_iframe;
+ int64_t vobu_start_pts;
} StreamInfo;
typedef struct {
int video_bound;
int is_mpeg2;
int is_vcd;
- int scr_stream_index; /* stream from which the system clock is
- computed (VBR case) */
+ int is_svcd;
+ int is_dvd;
int64_t last_scr; /* current system clock */
+
+ double vcd_padding_bitrate; //FIXME floats
+ int64_t vcd_padding_bytes_written;
+
} MpegMuxContext;
#define PACK_START_CODE ((unsigned int)0x000001ba)
#define PACKET_START_CODE_MASK ((unsigned int)0xffffff00)
#define PACKET_START_CODE_PREFIX ((unsigned int)0x00000100)
#define ISO_11172_END_CODE ((unsigned int)0x000001b9)
-
+
/* mpeg2 */
#define PROGRAM_STREAM_MAP 0x1bc
#define PRIVATE_STREAM_1 0x1bd
#define AUDIO_ID 0xc0
#define VIDEO_ID 0xe0
#define AC3_ID 0x80
+#define DTS_ID 0x8a
#define LPCM_ID 0xa0
+#define SUB_ID 0x20
+
+#define STREAM_TYPE_VIDEO_MPEG1 0x01
+#define STREAM_TYPE_VIDEO_MPEG2 0x02
+#define STREAM_TYPE_AUDIO_MPEG1 0x03
+#define STREAM_TYPE_AUDIO_MPEG2 0x04
+#define STREAM_TYPE_PRIVATE_SECTION 0x05
+#define STREAM_TYPE_PRIVATE_DATA 0x06
+#define STREAM_TYPE_AUDIO_AAC 0x0f
+#define STREAM_TYPE_VIDEO_MPEG4 0x10
+#define STREAM_TYPE_VIDEO_H264 0x1b
-#ifdef CONFIG_ENCODERS
-extern AVOutputFormat mpeg1system_mux;
-extern AVOutputFormat mpeg1vcd_mux;
-extern AVOutputFormat mpeg2vob_mux;
+#define STREAM_TYPE_AUDIO_AC3 0x81
+#define STREAM_TYPE_AUDIO_DTS 0x8a
static const int lpcm_freq_tab[4] = { 48000, 96000, 44100, 32000 };
-static int put_pack_header(AVFormatContext *ctx,
+#ifdef CONFIG_MUXERS
+AVOutputFormat mpeg1system_muxer;
+AVOutputFormat mpeg1vcd_muxer;
+AVOutputFormat mpeg2vob_muxer;
+AVOutputFormat mpeg2svcd_muxer;
+AVOutputFormat mpeg2dvd_muxer;
+
+static int put_pack_header(AVFormatContext *ctx,
uint8_t *buf, int64_t timestamp)
{
MpegMuxContext *s = ctx->priv_data;
PutBitContext pb;
-
+
init_put_bits(&pb, buf, 128);
put_bits(&pb, 32, PACK_START_CODE);
if (s->is_mpeg2) {
/* clock extension */
put_bits(&pb, 9, 0);
- put_bits(&pb, 1, 1);
}
put_bits(&pb, 1, 1);
put_bits(&pb, 22, s->mux_rate);
put_bits(&pb, 1, 1);
if (s->is_mpeg2) {
+ put_bits(&pb, 1, 1);
put_bits(&pb, 5, 0x1f); /* reserved */
put_bits(&pb, 3, 0); /* stuffing length */
}
return pbBufPtr(&pb) - pb.buf;
}
-static int put_system_header(AVFormatContext *ctx, uint8_t *buf)
+static int put_system_header(AVFormatContext *ctx, uint8_t *buf,int only_for_stream_id)
{
MpegMuxContext *s = ctx->priv_data;
- int size, rate_bound, i, private_stream_coded, id;
+ int size, i, private_stream_coded, id;
PutBitContext pb;
init_put_bits(&pb, buf, 128);
put_bits(&pb, 32, SYSTEM_HEADER_START_CODE);
put_bits(&pb, 16, 0);
put_bits(&pb, 1, 1);
-
- rate_bound = s->mux_rate; /* maximum bit rate of the multiplexed stream */
- put_bits(&pb, 22, rate_bound);
+
+ put_bits(&pb, 22, s->mux_rate); /* maximum bit rate of the multiplexed stream */
put_bits(&pb, 1, 1); /* marker */
- put_bits(&pb, 6, s->audio_bound);
+ if (s->is_vcd && only_for_stream_id==VIDEO_ID) {
+ /* This header applies only to the video stream (see VCD standard p. IV-7)*/
+ put_bits(&pb, 6, 0);
+ } else
+ put_bits(&pb, 6, s->audio_bound);
+
+ if (s->is_vcd) {
+ /* see VCD standard, p. IV-7*/
+ put_bits(&pb, 1, 0);
+ put_bits(&pb, 1, 1);
+ } else {
+ put_bits(&pb, 1, 0); /* variable bitrate*/
+ put_bits(&pb, 1, 0); /* non constrainted bit stream */
+ }
+
+ if (s->is_vcd || s->is_dvd) {
+ /* see VCD standard p IV-7 */
+ put_bits(&pb, 1, 1); /* audio locked */
+ put_bits(&pb, 1, 1); /* video locked */
+ } else {
+ put_bits(&pb, 1, 0); /* audio locked */
+ put_bits(&pb, 1, 0); /* video locked */
+ }
- put_bits(&pb, 1, 1); /* variable bitrate */
- put_bits(&pb, 1, 1); /* non constrainted bit stream */
-
- put_bits(&pb, 1, 0); /* audio locked */
- put_bits(&pb, 1, 0); /* video locked */
put_bits(&pb, 1, 1); /* marker */
- put_bits(&pb, 5, s->video_bound);
- put_bits(&pb, 8, 0xff); /* reserved byte */
-
- /* audio stream info */
- private_stream_coded = 0;
- for(i=0;i<ctx->nb_streams;i++) {
- StreamInfo *stream = ctx->streams[i]->priv_data;
- id = stream->id;
- if (id < 0xc0) {
- /* special case for private streams (AC3 use that) */
- if (private_stream_coded)
- continue;
- private_stream_coded = 1;
- id = 0xbd;
+ if (s->is_vcd && only_for_stream_id==AUDIO_ID) {
+ /* This header applies only to the audio stream (see VCD standard p. IV-7)*/
+ put_bits(&pb, 5, 0);
+ } else
+ put_bits(&pb, 5, s->video_bound);
+
+ if (s->is_dvd) {
+ put_bits(&pb, 1, 0); /* packet_rate_restriction_flag */
+ put_bits(&pb, 7, 0x7f); /* reserved byte */
+ } else
+ put_bits(&pb, 8, 0xff); /* reserved byte */
+
+ /* DVD-Video Stream_bound entries
+ id (0xB9) video, maximum P-STD for stream 0xE0. (P-STD_buffer_bound_scale = 1)
+ id (0xB8) audio, maximum P-STD for any MPEG audio (0xC0 to 0xC7) streams. If there are none set to 4096 (32x128). (P-STD_buffer_bound_scale = 0)
+ id (0xBD) private stream 1 (audio other than MPEG and subpictures). (P-STD_buffer_bound_scale = 1)
+ id (0xBF) private stream 2, NAV packs, set to 2x1024. */
+ if (s->is_dvd) {
+
+ int P_STD_max_video = 0;
+ int P_STD_max_mpeg_audio = 0;
+ int P_STD_max_mpeg_PS1 = 0;
+
+ for(i=0;i<ctx->nb_streams;i++) {
+ StreamInfo *stream = ctx->streams[i]->priv_data;
+
+ id = stream->id;
+ if (id == 0xbd && stream->max_buffer_size > P_STD_max_mpeg_PS1) {
+ P_STD_max_mpeg_PS1 = stream->max_buffer_size;
+ } else if (id >= 0xc0 && id <= 0xc7 && stream->max_buffer_size > P_STD_max_mpeg_audio) {
+ P_STD_max_mpeg_audio = stream->max_buffer_size;
+ } else if (id == 0xe0 && stream->max_buffer_size > P_STD_max_video) {
+ P_STD_max_video = stream->max_buffer_size;
+ }
}
- put_bits(&pb, 8, id); /* stream ID */
+
+ /* video */
+ put_bits(&pb, 8, 0xb9); /* stream ID */
put_bits(&pb, 2, 3);
- if (id < 0xe0) {
- /* audio */
- put_bits(&pb, 1, 0);
- put_bits(&pb, 13, stream->max_buffer_size / 128);
- } else {
- /* video */
- put_bits(&pb, 1, 1);
- put_bits(&pb, 13, stream->max_buffer_size / 1024);
+ put_bits(&pb, 1, 1);
+ put_bits(&pb, 13, P_STD_max_video / 1024);
+
+ /* audio */
+ if (P_STD_max_mpeg_audio == 0)
+ P_STD_max_mpeg_audio = 4096;
+ put_bits(&pb, 8, 0xb8); /* stream ID */
+ put_bits(&pb, 2, 3);
+ put_bits(&pb, 1, 0);
+ put_bits(&pb, 13, P_STD_max_mpeg_audio / 128);
+
+ /* private stream 1 */
+ put_bits(&pb, 8, 0xbd); /* stream ID */
+ put_bits(&pb, 2, 3);
+ put_bits(&pb, 1, 0);
+ put_bits(&pb, 13, P_STD_max_mpeg_PS1 / 128);
+
+ /* private stream 2 */
+ put_bits(&pb, 8, 0xbf); /* stream ID */
+ put_bits(&pb, 2, 3);
+ put_bits(&pb, 1, 1);
+ put_bits(&pb, 13, 2);
+ }
+ else {
+ /* audio stream info */
+ private_stream_coded = 0;
+ for(i=0;i<ctx->nb_streams;i++) {
+ StreamInfo *stream = ctx->streams[i]->priv_data;
+
+
+ /* For VCDs, only include the stream info for the stream
+ that the pack which contains this system belongs to.
+ (see VCD standard p. IV-7) */
+ if ( !s->is_vcd || stream->id==only_for_stream_id
+ || only_for_stream_id==0) {
+
+ id = stream->id;
+ if (id < 0xc0) {
+ /* special case for private streams (AC3 use that) */
+ if (private_stream_coded)
+ continue;
+ private_stream_coded = 1;
+ id = 0xbd;
+ }
+ put_bits(&pb, 8, id); /* stream ID */
+ put_bits(&pb, 2, 3);
+ if (id < 0xe0) {
+ /* audio */
+ put_bits(&pb, 1, 0);
+ put_bits(&pb, 13, stream->max_buffer_size / 128);
+ } else {
+ /* video */
+ put_bits(&pb, 1, 1);
+ put_bits(&pb, 13, stream->max_buffer_size / 1024);
+ }
+ }
}
}
+
flush_put_bits(&pb);
size = pbBufPtr(&pb) - pb.buf;
/* patch packet size */
{
int buf_index, i, private_stream_coded;
StreamInfo *stream;
+ MpegMuxContext *s = ctx->priv_data;
+
+ if (s->is_dvd)
+ return 18; // DVD-Video system headers are 18 bytes fixed length.
buf_index = 12;
private_stream_coded = 0;
static int mpeg_mux_init(AVFormatContext *ctx)
{
MpegMuxContext *s = ctx->priv_data;
- int bitrate, i, mpa_id, mpv_id, ac3_id, lpcm_id, j;
+ int bitrate, i, mpa_id, mpv_id, mps_id, ac3_id, dts_id, lpcm_id, j;
AVStream *st;
StreamInfo *stream;
+ int audio_bitrate;
+ int video_bitrate;
s->packet_number = 0;
- s->is_vcd = (ctx->oformat == &mpeg1vcd_mux);
- s->is_mpeg2 = (ctx->oformat == &mpeg2vob_mux);
-
- if (s->is_vcd)
- s->packet_size = 2324; /* VCD packet size */
+ s->is_vcd = (ctx->oformat == &mpeg1vcd_muxer);
+ s->is_svcd = (ctx->oformat == &mpeg2svcd_muxer);
+ s->is_mpeg2 = (ctx->oformat == &mpeg2vob_muxer || ctx->oformat == &mpeg2svcd_muxer || ctx->oformat == &mpeg2dvd_muxer);
+ s->is_dvd = (ctx->oformat == &mpeg2dvd_muxer);
+
+ if(ctx->packet_size)
+ s->packet_size = ctx->packet_size;
else
s->packet_size = 2048;
-
+
+ s->vcd_padding_bytes_written = 0;
+ s->vcd_padding_bitrate=0;
+
s->audio_bound = 0;
s->video_bound = 0;
mpa_id = AUDIO_ID;
ac3_id = AC3_ID;
+ dts_id = DTS_ID;
mpv_id = VIDEO_ID;
+ mps_id = SUB_ID;
lpcm_id = LPCM_ID;
- s->scr_stream_index = -1;
for(i=0;i<ctx->nb_streams;i++) {
st = ctx->streams[i];
stream = av_mallocz(sizeof(StreamInfo));
goto fail;
st->priv_data = stream;
- switch(st->codec.codec_type) {
+ av_set_pts_info(st, 64, 1, 90000);
+
+ switch(st->codec->codec_type) {
case CODEC_TYPE_AUDIO:
- if (st->codec.codec_id == CODEC_ID_AC3) {
+ if (st->codec->codec_id == CODEC_ID_AC3) {
stream->id = ac3_id++;
- } else if (st->codec.codec_id == CODEC_ID_PCM_S16BE) {
+ } else if (st->codec->codec_id == CODEC_ID_DTS) {
+ stream->id = dts_id++;
+ } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
stream->id = lpcm_id++;
for(j = 0; j < 4; j++) {
- if (lpcm_freq_tab[j] == st->codec.sample_rate)
+ if (lpcm_freq_tab[j] == st->codec->sample_rate)
break;
}
if (j == 4)
goto fail;
- if (st->codec.channels > 8)
+ if (st->codec->channels > 8)
return -1;
stream->lpcm_header[0] = 0x0c;
- stream->lpcm_header[1] = (st->codec.channels - 1) | (j << 4);
+ stream->lpcm_header[1] = (st->codec->channels - 1) | (j << 4);
stream->lpcm_header[2] = 0x80;
- stream->lpcm_align = st->codec.channels * 2;
+ stream->lpcm_align = st->codec->channels * 2;
} else {
stream->id = mpa_id++;
}
- stream->max_buffer_size = 4 * 1024;
+
+ /* This value HAS to be used for VCD (see VCD standard, p. IV-7).
+ Right now it is also used for everything else.*/
+ stream->max_buffer_size = 4 * 1024;
s->audio_bound++;
break;
case CODEC_TYPE_VIDEO:
- /* by default, video is used for the SCR computation */
- if (s->scr_stream_index == -1)
- s->scr_stream_index = i;
stream->id = mpv_id++;
- stream->max_buffer_size = 46 * 1024;
+ if (st->codec->rc_buffer_size)
+ stream->max_buffer_size = 6*1024 + st->codec->rc_buffer_size/8;
+ else
+ stream->max_buffer_size = 230*1024; //FIXME this is probably too small as default
+#if 0
+ /* see VCD standard, p. IV-7*/
+ stream->max_buffer_size = 46 * 1024;
+ else
+ /* This value HAS to be used for SVCD (see SVCD standard, p. 26 V.2.3.2).
+ Right now it is also used for everything else.*/
+ stream->max_buffer_size = 230 * 1024;
+#endif
s->video_bound++;
break;
+ case CODEC_TYPE_SUBTITLE:
+ stream->id = mps_id++;
+ stream->max_buffer_size = 16 * 1024;
+ break;
default:
- av_abort();
+ return -1;
}
+ av_fifo_init(&stream->fifo, 16);
}
- /* if no SCR, use first stream (audio) */
- if (s->scr_stream_index == -1)
- s->scr_stream_index = 0;
-
- /* we increase slightly the bitrate to take into account the
- headers. XXX: compute it exactly */
- bitrate = 2000;
+ bitrate = 0;
+ audio_bitrate = 0;
+ video_bitrate = 0;
for(i=0;i<ctx->nb_streams;i++) {
+ int codec_rate;
st = ctx->streams[i];
- bitrate += st->codec.bit_rate;
+ stream = (StreamInfo*) st->priv_data;
+
+ if(st->codec->rc_max_rate || stream->id==VIDEO_ID)
+ codec_rate= st->codec->rc_max_rate;
+ else
+ codec_rate= st->codec->bit_rate;
+
+ if(!codec_rate)
+ codec_rate= (1<<21)*8*50/ctx->nb_streams;
+
+ bitrate += codec_rate;
+
+ if (stream->id==AUDIO_ID)
+ audio_bitrate += codec_rate;
+ else if (stream->id==VIDEO_ID)
+ video_bitrate += codec_rate;
+ }
+
+ if(ctx->mux_rate){
+ s->mux_rate= (ctx->mux_rate + (8 * 50) - 1) / (8 * 50);
+ } else {
+ /* we increase slightly the bitrate to take into account the
+ headers. XXX: compute it exactly */
+ bitrate += bitrate*5/100;
+ bitrate += 10000;
+ s->mux_rate = (bitrate + (8 * 50) - 1) / (8 * 50);
}
- s->mux_rate = (bitrate + (8 * 50) - 1) / (8 * 50);
-
+
+ if (s->is_vcd) {
+ double overhead_rate;
+
+ /* The VCD standard mandates that the mux_rate field is 3528
+ (see standard p. IV-6).
+ The value is actually "wrong", i.e. if you calculate
+ it using the normal formula and the 75 sectors per second transfer
+ rate you get a different value because the real pack size is 2324,
+ not 2352. But the standard explicitly specifies that the mux_rate
+ field in the header must have this value.*/
+// s->mux_rate=2352 * 75 / 50; /* = 3528*/
+
+ /* The VCD standard states that the muxed stream must be
+ exactly 75 packs / second (the data rate of a single speed cdrom).
+ Since the video bitrate (probably 1150000 bits/sec) will be below
+ the theoretical maximum we have to add some padding packets
+ to make up for the lower data rate.
+ (cf. VCD standard p. IV-6 )*/
+
+ /* Add the header overhead to the data rate.
+ 2279 data bytes per audio pack, 2294 data bytes per video pack*/
+ overhead_rate = ((audio_bitrate / 8.0) / 2279) * (2324 - 2279);
+ overhead_rate += ((video_bitrate / 8.0) / 2294) * (2324 - 2294);
+ overhead_rate *= 8;
+
+ /* Add padding so that the full bitrate is 2324*75 bytes/sec */
+ s->vcd_padding_bitrate = 2324 * 75 * 8 - (bitrate + overhead_rate);
+ }
+
if (s->is_vcd || s->is_mpeg2)
/* every packet */
s->pack_header_freq = 1;
/* the above seems to make pack_header_freq zero sometimes */
if (s->pack_header_freq == 0)
s->pack_header_freq = 1;
-
+
if (s->is_mpeg2)
/* every 200 packets. Need to look at the spec. */
s->system_header_freq = s->pack_header_freq * 40;
else if (s->is_vcd)
- /* every 40 packets, this is my invention */
- s->system_header_freq = s->pack_header_freq * 40;
+ /* the standard mandates that there are only two system headers
+ in the whole file: one in the first packet of each stream.
+ (see standard p. IV-7 and IV-8) */
+ s->system_header_freq = 0x7fffffff;
else
s->system_header_freq = s->pack_header_freq * 5;
-
+
for(i=0;i<ctx->nb_streams;i++) {
stream = ctx->streams[i]->priv_data;
- stream->buffer_ptr = 0;
stream->packet_number = 0;
- stream->start_pts = AV_NOPTS_VALUE;
- stream->start_dts = AV_NOPTS_VALUE;
}
s->system_header_size = get_system_header_size(ctx);
s->last_scr = 0;
static inline void put_timestamp(ByteIOContext *pb, int id, int64_t timestamp)
{
- put_byte(pb,
- (id << 4) |
- (((timestamp >> 30) & 0x07) << 1) |
+ put_byte(pb,
+ (id << 4) |
+ (((timestamp >> 30) & 0x07) << 1) |
1);
put_be16(pb, (uint16_t)((((timestamp >> 15) & 0x7fff) << 1) | 1));
put_be16(pb, (uint16_t)((((timestamp) & 0x7fff) << 1) | 1));
}
+/* return the number of padding bytes that should be inserted into
+ the multiplexed stream.*/
+static int get_vcd_padding_size(AVFormatContext *ctx, int64_t pts)
+{
+ MpegMuxContext *s = ctx->priv_data;
+ int pad_bytes = 0;
+
+ if (s->vcd_padding_bitrate > 0 && pts!=AV_NOPTS_VALUE)
+ {
+ int64_t full_pad_bytes;
+
+ full_pad_bytes = (int64_t)((s->vcd_padding_bitrate * (pts / 90000.0)) / 8.0); //FIXME this is wrong
+ pad_bytes = (int) (full_pad_bytes - s->vcd_padding_bytes_written);
+
+ if (pad_bytes<0)
+ /* might happen if we have already padded to a later timestamp. This
+ can occur if another stream has already advanced further.*/
+ pad_bytes=0;
+ }
+
+ return pad_bytes;
+}
+
+
+#if 0 /* unused, remove? */
/* return the exact available payload size for the next packet for
stream 'stream_index'. 'pts' and 'dts' are only used to know if
timestamps are needed in the packet header. */
int buf_index;
StreamInfo *stream;
+ stream = ctx->streams[stream_index]->priv_data;
+
buf_index = 0;
if (((s->packet_number % s->pack_header_freq) == 0)) {
/* pack header size */
- if (s->is_mpeg2)
+ if (s->is_mpeg2)
buf_index += 14;
else
buf_index += 12;
- if ((s->packet_number % s->system_header_freq) == 0)
- buf_index += s->system_header_size;
- }
- /* packet header size */
- buf_index += 6;
- if (s->is_mpeg2)
- buf_index += 3;
- if (pts != AV_NOPTS_VALUE) {
- if (dts != pts)
- buf_index += 5 + 5;
- else
- buf_index += 5;
- } else {
- if (!s->is_mpeg2)
- buf_index++;
+ if (s->is_vcd) {
+ /* there is exactly one system header for each stream in a VCD MPEG,
+ One in the very first video packet and one in the very first
+ audio packet (see VCD standard p. IV-7 and IV-8).*/
+
+ if (stream->packet_number==0)
+ /* The system headers refer only to the stream they occur in,
+ so they have a constant size.*/
+ buf_index += 15;
+
+ } else {
+ if ((s->packet_number % s->system_header_freq) == 0)
+ buf_index += s->system_header_size;
+ }
}
-
- stream = ctx->streams[stream_index]->priv_data;
- if (stream->id < 0xc0) {
- /* AC3/LPCM private data header */
- buf_index += 4;
- if (stream->id >= 0xa0) {
- int n;
+
+ if ((s->is_vcd && stream->packet_number==0)
+ || (s->is_svcd && s->packet_number==0))
+ /* the first pack of each stream contains only the pack header,
+ the system header and some padding (see VCD standard p. IV-6)
+ Add the padding size, so that the actual payload becomes 0.*/
+ buf_index += s->packet_size - buf_index;
+ else {
+ /* packet header size */
+ buf_index += 6;
+ if (s->is_mpeg2) {
buf_index += 3;
- /* NOTE: we round the payload size to an integer number of
- LPCM samples */
- n = (s->packet_size - buf_index) % stream->lpcm_align;
- if (n)
- buf_index += (stream->lpcm_align - n);
+ if (stream->packet_number==0)
+ buf_index += 3; /* PES extension */
+ buf_index += 1; /* obligatory stuffing byte */
}
+ if (pts != AV_NOPTS_VALUE) {
+ if (dts != pts)
+ buf_index += 5 + 5;
+ else
+ buf_index += 5;
+
+ } else {
+ if (!s->is_mpeg2)
+ buf_index++;
+ }
+
+ if (stream->id < 0xc0) {
+ /* AC3/LPCM private data header */
+ buf_index += 4;
+ if (stream->id >= 0xa0) {
+ int n;
+ buf_index += 3;
+ /* NOTE: we round the payload size to an integer number of
+ LPCM samples */
+ n = (s->packet_size - buf_index) % stream->lpcm_align;
+ if (n)
+ buf_index += (stream->lpcm_align - n);
+ }
+ }
+
+ if (s->is_vcd && stream->id == AUDIO_ID)
+ /* The VCD standard demands that 20 zero bytes follow
+ each audio packet (see standard p. IV-8).*/
+ buf_index+=20;
}
- return s->packet_size - buf_index;
+ return s->packet_size - buf_index;
+}
+#endif
+
+/* Write an MPEG padding packet header. */
+static void put_padding_packet(AVFormatContext *ctx, ByteIOContext *pb,int packet_bytes)
+{
+ MpegMuxContext *s = ctx->priv_data;
+ int i;
+
+ put_be32(pb, PADDING_STREAM);
+ put_be16(pb, packet_bytes - 6);
+ if (!s->is_mpeg2) {
+ put_byte(pb, 0x0f);
+ packet_bytes -= 7;
+ } else
+ packet_bytes -= 6;
+
+ for(i=0;i<packet_bytes;i++)
+ put_byte(pb, 0xff);
+}
+
+static int get_nb_frames(AVFormatContext *ctx, StreamInfo *stream, int len){
+ int nb_frames=0;
+ PacketDesc *pkt_desc= stream->premux_packet;
+
+ while(len>0){
+ if(pkt_desc->size == pkt_desc->unwritten_size)
+ nb_frames++;
+ len -= pkt_desc->unwritten_size;
+ pkt_desc= pkt_desc->next;
+ }
+
+ return nb_frames;
}
/* flush the packet on stream stream_index */
-static void flush_packet(AVFormatContext *ctx, int stream_index,
- int64_t pts, int64_t dts, int64_t scr)
+static int flush_packet(AVFormatContext *ctx, int stream_index,
+ int64_t pts, int64_t dts, int64_t scr, int trailer_size)
{
MpegMuxContext *s = ctx->priv_data;
StreamInfo *stream = ctx->streams[stream_index]->priv_data;
int size, payload_size, startcode, id, stuffing_size, i, header_len;
int packet_size;
uint8_t buffer[128];
-
+ int zero_trail_bytes = 0;
+ int pad_packet_bytes = 0;
+ int pes_flags;
+ int general_pack = 0; /*"general" pack without data specific to one stream?*/
+ int nb_frames;
+
id = stream->id;
-
+
#if 0
- printf("packet ID=%2x PTS=%0.3f\n",
+ printf("packet ID=%2x PTS=%0.3f\n",
id, pts / 90000.0);
#endif
buf_ptr = buffer;
- if (((s->packet_number % s->pack_header_freq) == 0)) {
+
+ if ((s->packet_number % s->pack_header_freq) == 0 || s->last_scr != scr) {
/* output pack and systems header if needed */
size = put_pack_header(ctx, buf_ptr, scr);
buf_ptr += size;
- if ((s->packet_number % s->system_header_freq) == 0) {
- size = put_system_header(ctx, buf_ptr);
- buf_ptr += size;
+ s->last_scr= scr;
+
+ if (s->is_vcd) {
+ /* there is exactly one system header for each stream in a VCD MPEG,
+ One in the very first video packet and one in the very first
+ audio packet (see VCD standard p. IV-7 and IV-8).*/
+
+ if (stream->packet_number==0) {
+ size = put_system_header(ctx, buf_ptr, id);
+ buf_ptr += size;
+ }
+ } else if (s->is_dvd) {
+ if (stream->align_iframe || s->packet_number == 0){
+ int PES_bytes_to_fill = s->packet_size - size - 10;
+
+ if (pts != AV_NOPTS_VALUE) {
+ if (dts != pts)
+ PES_bytes_to_fill -= 5 + 5;
+ else
+ PES_bytes_to_fill -= 5;
+ }
+
+ if (stream->bytes_to_iframe == 0 || s->packet_number == 0) {
+ size = put_system_header(ctx, buf_ptr, 0);
+ buf_ptr += size;
+ size = buf_ptr - buffer;
+ put_buffer(&ctx->pb, buffer, size);
+
+ put_be32(&ctx->pb, PRIVATE_STREAM_2);
+ put_be16(&ctx->pb, 0x03d4); // length
+ put_byte(&ctx->pb, 0x00); // substream ID, 00=PCI
+ for (i = 0; i < 979; i++)
+ put_byte(&ctx->pb, 0x00);
+
+ put_be32(&ctx->pb, PRIVATE_STREAM_2);
+ put_be16(&ctx->pb, 0x03fa); // length
+ put_byte(&ctx->pb, 0x01); // substream ID, 01=DSI
+ for (i = 0; i < 1017; i++)
+ put_byte(&ctx->pb, 0x00);
+
+ memset(buffer, 0, 128);
+ buf_ptr = buffer;
+ s->packet_number++;
+ stream->align_iframe = 0;
+ scr += s->packet_size*90000LL / (s->mux_rate*50LL); //FIXME rounding and first few bytes of each packet
+ size = put_pack_header(ctx, buf_ptr, scr);
+ s->last_scr= scr;
+ buf_ptr += size;
+ /* GOP Start */
+ } else if (stream->bytes_to_iframe < PES_bytes_to_fill) {
+ pad_packet_bytes = PES_bytes_to_fill - stream->bytes_to_iframe;
+ }
+ }
+ } else {
+ if ((s->packet_number % s->system_header_freq) == 0) {
+ size = put_system_header(ctx, buf_ptr, 0);
+ buf_ptr += size;
+ }
}
}
size = buf_ptr - buffer;
put_buffer(&ctx->pb, buffer, size);
- /* packet header */
- if (s->is_mpeg2) {
- header_len = 3;
- } else {
- header_len = 0;
- }
- if (pts != AV_NOPTS_VALUE) {
- if (dts != pts)
- header_len += 5 + 5;
- else
- header_len += 5;
- } else {
- if (!s->is_mpeg2)
- header_len++;
- }
-
- packet_size = s->packet_size - (size + 6);
- payload_size = packet_size - header_len;
- if (id < 0xc0) {
- startcode = PRIVATE_STREAM_1;
- payload_size -= 4;
- if (id >= 0xa0)
- payload_size -= 3;
- } else {
- startcode = 0x100 + id;
+ packet_size = s->packet_size - size;
+
+ if (s->is_vcd && id == AUDIO_ID)
+ /* The VCD standard demands that 20 zero bytes follow
+ each audio pack (see standard p. IV-8).*/
+ zero_trail_bytes += 20;
+
+ if ((s->is_vcd && stream->packet_number==0)
+ || (s->is_svcd && s->packet_number==0)) {
+ /* for VCD the first pack of each stream contains only the pack header,
+ the system header and lots of padding (see VCD standard p. IV-6).
+ In the case of an audio pack, 20 zero bytes are also added at
+ the end.*/
+ /* For SVCD we fill the very first pack to increase compatibility with
+ some DVD players. Not mandated by the standard.*/
+ if (s->is_svcd)
+ general_pack = 1; /* the system header refers to both streams and no stream data*/
+ pad_packet_bytes = packet_size - zero_trail_bytes;
}
- stuffing_size = payload_size - stream->buffer_ptr;
- if (stuffing_size < 0)
- stuffing_size = 0;
- put_be32(&ctx->pb, startcode);
+ packet_size -= pad_packet_bytes + zero_trail_bytes;
- put_be16(&ctx->pb, packet_size);
- /* stuffing */
- for(i=0;i<stuffing_size;i++)
- put_byte(&ctx->pb, 0xff);
+ if (packet_size > 0) {
- if (s->is_mpeg2) {
- put_byte(&ctx->pb, 0x80); /* mpeg2 id */
+ /* packet header size */
+ packet_size -= 6;
+ /* packet header */
+ if (s->is_mpeg2) {
+ header_len = 3;
+ if (stream->packet_number==0)
+ header_len += 3; /* PES extension */
+ header_len += 1; /* obligatory stuffing byte */
+ } else {
+ header_len = 0;
+ }
if (pts != AV_NOPTS_VALUE) {
- if (dts != pts) {
- put_byte(&ctx->pb, 0xc0); /* flags */
- put_byte(&ctx->pb, header_len - 3);
- put_timestamp(&ctx->pb, 0x03, pts);
- put_timestamp(&ctx->pb, 0x01, dts);
- } else {
- put_byte(&ctx->pb, 0x80); /* flags */
- put_byte(&ctx->pb, header_len - 3);
- put_timestamp(&ctx->pb, 0x02, pts);
+ if (dts != pts)
+ header_len += 5 + 5;
+ else
+ header_len += 5;
+ } else {
+ if (!s->is_mpeg2)
+ header_len++;
+ }
+
+ payload_size = packet_size - header_len;
+ if (id < 0xc0) {
+ startcode = PRIVATE_STREAM_1;
+ payload_size -= 1;
+ if (id >= 0x40) {
+ payload_size -= 3;
+ if (id >= 0xa0)
+ payload_size -= 3;
}
} else {
- put_byte(&ctx->pb, 0x00); /* flags */
- put_byte(&ctx->pb, header_len - 3);
+ startcode = 0x100 + id;
}
- } else {
- if (pts != AV_NOPTS_VALUE) {
- if (dts != pts) {
- put_timestamp(&ctx->pb, 0x03, pts);
- put_timestamp(&ctx->pb, 0x01, dts);
+
+ stuffing_size = payload_size - av_fifo_size(&stream->fifo);
+
+ // first byte doesnt fit -> reset pts/dts + stuffing
+ if(payload_size <= trailer_size && pts != AV_NOPTS_VALUE){
+ int timestamp_len=0;
+ if(dts != pts)
+ timestamp_len += 5;
+ if(pts != AV_NOPTS_VALUE)
+ timestamp_len += s->is_mpeg2 ? 5 : 4;
+ pts=dts= AV_NOPTS_VALUE;
+ header_len -= timestamp_len;
+ if (s->is_dvd && stream->align_iframe) {
+ pad_packet_bytes += timestamp_len;
+ packet_size -= timestamp_len;
} else {
- put_timestamp(&ctx->pb, 0x02, pts);
+ payload_size += timestamp_len;
}
- } else {
- put_byte(&ctx->pb, 0x0f);
+ stuffing_size += timestamp_len;
+ if(payload_size > trailer_size)
+ stuffing_size += payload_size - trailer_size;
}
- }
- if (startcode == PRIVATE_STREAM_1) {
- put_byte(&ctx->pb, id);
- if (id >= 0xa0) {
- /* LPCM (XXX: check nb_frames) */
- put_byte(&ctx->pb, 7);
- put_be16(&ctx->pb, 4); /* skip 3 header bytes */
- put_byte(&ctx->pb, stream->lpcm_header[0]);
- put_byte(&ctx->pb, stream->lpcm_header[1]);
- put_byte(&ctx->pb, stream->lpcm_header[2]);
+ if (pad_packet_bytes > 0 && pad_packet_bytes <= 7) { // can't use padding, so use stuffing
+ packet_size += pad_packet_bytes;
+ payload_size += pad_packet_bytes; // undo the previous adjustment
+ if (stuffing_size < 0) {
+ stuffing_size = pad_packet_bytes;
+ } else {
+ stuffing_size += pad_packet_bytes;
+ }
+ pad_packet_bytes = 0;
+ }
+
+ if (stuffing_size < 0)
+ stuffing_size = 0;
+ if (stuffing_size > 16) { /*<=16 for MPEG-1, <=32 for MPEG-2*/
+ pad_packet_bytes += stuffing_size;
+ packet_size -= stuffing_size;
+ payload_size -= stuffing_size;
+ stuffing_size = 0;
+ }
+
+ nb_frames= get_nb_frames(ctx, stream, payload_size - stuffing_size);
+
+ put_be32(&ctx->pb, startcode);
+
+ put_be16(&ctx->pb, packet_size);
+
+ if (!s->is_mpeg2)
+ for(i=0;i<stuffing_size;i++)
+ put_byte(&ctx->pb, 0xff);
+
+ if (s->is_mpeg2) {
+ put_byte(&ctx->pb, 0x80); /* mpeg2 id */
+
+ pes_flags=0;
+
+ if (pts != AV_NOPTS_VALUE) {
+ pes_flags |= 0x80;
+ if (dts != pts)
+ pes_flags |= 0x40;
+ }
+
+ /* Both the MPEG-2 and the SVCD standards demand that the
+ P-STD_buffer_size field be included in the first packet of
+ every stream. (see SVCD standard p. 26 V.2.3.1 and V.2.3.2
+ and MPEG-2 standard 2.7.7) */
+ if (stream->packet_number == 0)
+ pes_flags |= 0x01;
+
+ put_byte(&ctx->pb, pes_flags); /* flags */
+ put_byte(&ctx->pb, header_len - 3 + stuffing_size);
+
+ if (pes_flags & 0x80) /*write pts*/
+ put_timestamp(&ctx->pb, (pes_flags & 0x40) ? 0x03 : 0x02, pts);
+ if (pes_flags & 0x40) /*write dts*/
+ put_timestamp(&ctx->pb, 0x01, dts);
+
+ if (pes_flags & 0x01) { /*write pes extension*/
+ put_byte(&ctx->pb, 0x10); /* flags */
+
+ /* P-STD buffer info */
+ if (id == AUDIO_ID)
+ put_be16(&ctx->pb, 0x4000 | stream->max_buffer_size/128);
+ else
+ put_be16(&ctx->pb, 0x6000 | stream->max_buffer_size/1024);
+ }
+
} else {
- /* AC3 */
- put_byte(&ctx->pb, stream->nb_frames);
- put_be16(&ctx->pb, stream->frame_start_offset);
+ if (pts != AV_NOPTS_VALUE) {
+ if (dts != pts) {
+ put_timestamp(&ctx->pb, 0x03, pts);
+ put_timestamp(&ctx->pb, 0x01, dts);
+ } else {
+ put_timestamp(&ctx->pb, 0x02, pts);
+ }
+ } else {
+ put_byte(&ctx->pb, 0x0f);
+ }
+ }
+
+ if (s->is_mpeg2) {
+ /* special stuffing byte that is always written
+ to prevent accidental generation of start codes. */
+ put_byte(&ctx->pb, 0xff);
+
+ for(i=0;i<stuffing_size;i++)
+ put_byte(&ctx->pb, 0xff);
+ }
+
+ if (startcode == PRIVATE_STREAM_1) {
+ put_byte(&ctx->pb, id);
+ if (id >= 0xa0) {
+ /* LPCM (XXX: check nb_frames) */
+ put_byte(&ctx->pb, 7);
+ put_be16(&ctx->pb, 4); /* skip 3 header bytes */
+ put_byte(&ctx->pb, stream->lpcm_header[0]);
+ put_byte(&ctx->pb, stream->lpcm_header[1]);
+ put_byte(&ctx->pb, stream->lpcm_header[2]);
+ } else if (id >= 0x40) {
+ /* AC3 */
+ put_byte(&ctx->pb, nb_frames);
+ put_be16(&ctx->pb, trailer_size+1);
+ }
}
+
+ /* output data */
+ if(av_fifo_generic_read(&stream->fifo, payload_size - stuffing_size, &put_buffer, &ctx->pb) < 0)
+ return -1;
+ stream->bytes_to_iframe -= payload_size - stuffing_size;
+ }else{
+ payload_size=
+ stuffing_size= 0;
}
- /* output data */
- put_buffer(&ctx->pb, stream->buffer, payload_size - stuffing_size);
+ if (pad_packet_bytes > 0)
+ put_padding_packet(ctx,&ctx->pb, pad_packet_bytes);
+
+ for(i=0;i<zero_trail_bytes;i++)
+ put_byte(&ctx->pb, 0x00);
+
put_flush_packet(&ctx->pb);
-
+
s->packet_number++;
- stream->packet_number++;
- stream->nb_frames = 0;
- stream->frame_start_offset = 0;
+
+ /* only increase the stream packet number if this pack actually contains
+ something that is specific to this stream! I.e. a dedicated header
+ or some data.*/
+ if (!general_pack)
+ stream->packet_number++;
+
+ return payload_size - stuffing_size;
}
-/* XXX: move that to upper layer */
-/* XXX: we assume that there are always 'max_b_frames' between
- reference frames. A better solution would be to use the AVFrame pts
- field */
-static void compute_pts_dts(AVStream *st, int64_t *ppts, int64_t *pdts,
- int64_t timestamp)
+static void put_vcd_padding_sector(AVFormatContext *ctx)
{
- int frame_delay;
- int64_t pts, dts;
+ /* There are two ways to do this padding: writing a sector/pack
+ of 0 values, or writing an MPEG padding pack. Both seem to
+ work with most decoders, BUT the VCD standard only allows a 0-sector
+ (see standard p. IV-4, IV-5).
+ So a 0-sector it is...*/
- if (st->codec.codec_type == CODEC_TYPE_VIDEO &&
- st->codec.max_b_frames != 0) {
- frame_delay = (st->codec.frame_rate_base * 90000LL) /
- st->codec.frame_rate;
- if (timestamp == 0) {
- /* specific case for first frame : DTS just before */
- pts = timestamp;
- dts = timestamp - frame_delay;
- } else {
- timestamp -= frame_delay;
- if (st->codec.coded_frame->pict_type == FF_B_TYPE) {
- /* B frames has identical pts/dts */
- pts = timestamp;
- dts = timestamp;
- } else {
- /* a reference frame has a pts equal to the dts of the
- _next_ one */
- dts = timestamp;
- pts = timestamp + (st->codec.max_b_frames + 1) * frame_delay;
+ MpegMuxContext *s = ctx->priv_data;
+ int i;
+
+ for(i=0;i<s->packet_size;i++)
+ put_byte(&ctx->pb, 0);
+
+ s->vcd_padding_bytes_written += s->packet_size;
+
+ put_flush_packet(&ctx->pb);
+
+ /* increasing the packet number is correct. The SCR of the following packs
+ is calculated from the packet_number and it has to include the padding
+ sector (it represents the sector index, not the MPEG pack index)
+ (see VCD standard p. IV-6)*/
+ s->packet_number++;
+}
+
+#if 0 /* unused, remove? */
+static int64_t get_vcd_scr(AVFormatContext *ctx,int stream_index,int64_t pts)
+{
+ MpegMuxContext *s = ctx->priv_data;
+ int64_t scr;
+
+ /* Since the data delivery rate is constant, SCR is computed
+ using the formula C + i * 1200 where C is the start constant
+ and i is the pack index.
+ It is recommended that SCR 0 is at the beginning of the VCD front
+ margin (a sequence of empty Form 2 sectors on the CD).
+ It is recommended that the front margin is 30 sectors long, so
+ we use C = 30*1200 = 36000
+ (Note that even if the front margin is not 30 sectors the file
+ will still be correct according to the standard. It just won't have
+ the "recommended" value).*/
+ scr = 36000 + s->packet_number * 1200;
+
+ return scr;
+}
+#endif
+
+static int remove_decoded_packets(AVFormatContext *ctx, int64_t scr){
+// MpegMuxContext *s = ctx->priv_data;
+ int i;
+
+ for(i=0; i<ctx->nb_streams; i++){
+ AVStream *st = ctx->streams[i];
+ StreamInfo *stream = st->priv_data;
+ PacketDesc *pkt_desc= stream->predecode_packet;
+
+ while(pkt_desc && scr > pkt_desc->dts){ //FIXME > vs >=
+ if(stream->buffer_index < pkt_desc->size ||
+ stream->predecode_packet == stream->premux_packet){
+ av_log(ctx, AV_LOG_ERROR, "buffer underflow\n");
+ break;
}
+ stream->buffer_index -= pkt_desc->size;
+
+ stream->predecode_packet= pkt_desc->next;
+ av_freep(&pkt_desc);
}
-#if 1
- printf("pts=%0.3f dts=%0.3f pict_type=%c\n",
- pts / 90000.0, dts / 90000.0,
- av_get_pict_type_char(st->codec.coded_frame->pict_type));
-#endif
- } else {
- pts = timestamp;
- dts = timestamp;
}
- *ppts = pts & ((1LL << 33) - 1);
- *pdts = dts & ((1LL << 33) - 1);
+
+ return 0;
}
-static int mpeg_mux_write_packet(AVFormatContext *ctx, int stream_index,
- const uint8_t *buf, int size,
- int64_t timestamp)
-{
+static int output_packet(AVFormatContext *ctx, int flush){
MpegMuxContext *s = ctx->priv_data;
- AVStream *st = ctx->streams[stream_index];
- StreamInfo *stream = st->priv_data;
- int64_t pts, dts, new_start_pts, new_start_dts;
- int len, avail_size;
+ AVStream *st;
+ StreamInfo *stream;
+ int i, avail_space, es_size, trailer_size;
+ int best_i= -1;
+ int best_score= INT_MIN;
+ int ignore_constraints=0;
+ int64_t scr= s->last_scr;
+ PacketDesc *timestamp_packet;
+ const int64_t max_delay= av_rescale(ctx->max_delay, 90000, AV_TIME_BASE);
+
+retry:
+ for(i=0; i<ctx->nb_streams; i++){
+ AVStream *st = ctx->streams[i];
+ StreamInfo *stream = st->priv_data;
+ const int avail_data= av_fifo_size(&stream->fifo);
+ const int space= stream->max_buffer_size - stream->buffer_index;
+ int rel_space= 1024*space / stream->max_buffer_size;
+ PacketDesc *next_pkt= stream->premux_packet;
+
+ /* for subtitle, a single PES packet must be generated,
+ so we flush after every single subtitle packet */
+ if(s->packet_size > avail_data && !flush
+ && st->codec->codec_type != CODEC_TYPE_SUBTITLE)
+ return 0;
+ if(avail_data==0)
+ continue;
+ assert(avail_data>0);
+
+ if(space < s->packet_size && !ignore_constraints)
+ continue;
+
+ if(next_pkt && next_pkt->dts - scr > max_delay)
+ continue;
+
+ if(rel_space > best_score){
+ best_score= rel_space;
+ best_i = i;
+ avail_space= space;
+ }
+ }
- compute_pts_dts(st, &pts, &dts, timestamp);
+ if(best_i < 0){
+ int64_t best_dts= INT64_MAX;
+
+ for(i=0; i<ctx->nb_streams; i++){
+ AVStream *st = ctx->streams[i];
+ StreamInfo *stream = st->priv_data;
+ PacketDesc *pkt_desc= stream->predecode_packet;
+ if(pkt_desc && pkt_desc->dts < best_dts)
+ best_dts= pkt_desc->dts;
+ }
- /* XXX: system clock should be computed precisely, especially for
- CBR case. The current mode gives at least something coherent */
- if (stream_index == s->scr_stream_index)
- s->last_scr = pts;
-
#if 0
- printf("%d: pts=%0.3f dts=%0.3f scr=%0.3f\n",
- stream_index,
- pts / 90000.0,
- dts / 90000.0,
- s->last_scr / 90000.0);
+ av_log(ctx, AV_LOG_DEBUG, "bumping scr, scr:%f, dts:%f\n",
+ scr/90000.0, best_dts/90000.0);
#endif
-
- /* we assume here that pts != AV_NOPTS_VALUE */
- new_start_pts = stream->start_pts;
- new_start_dts = stream->start_dts;
-
- if (stream->start_pts == AV_NOPTS_VALUE) {
- new_start_pts = pts;
- new_start_dts = dts;
+ if(best_dts == INT64_MAX)
+ return 0;
+
+ if(scr >= best_dts+1 && !ignore_constraints){
+ av_log(ctx, AV_LOG_ERROR, "packet too large, ignoring buffer limits to mux it\n");
+ ignore_constraints= 1;
+ }
+ scr= FFMAX(best_dts+1, scr);
+ if(remove_decoded_packets(ctx, scr) < 0)
+ return -1;
+ goto retry;
+ }
+
+ assert(best_i >= 0);
+
+ st = ctx->streams[best_i];
+ stream = st->priv_data;
+
+ assert(av_fifo_size(&stream->fifo) > 0);
+
+ assert(avail_space >= s->packet_size || ignore_constraints);
+
+ timestamp_packet= stream->premux_packet;
+ if(timestamp_packet->unwritten_size == timestamp_packet->size){
+ trailer_size= 0;
+ }else{
+ trailer_size= timestamp_packet->unwritten_size;
+ timestamp_packet= timestamp_packet->next;
}
- avail_size = get_packet_payload_size(ctx, stream_index,
- new_start_pts,
- new_start_dts);
- if (stream->buffer_ptr >= avail_size) {
- /* unlikely case: outputing the pts or dts increase the packet
- size so that we cannot write the start of the next
- packet. In this case, we must flush the current packet with
- padding */
- flush_packet(ctx, stream_index,
- stream->start_pts, stream->start_dts, s->last_scr);
- stream->buffer_ptr = 0;
+
+ if(timestamp_packet){
+//av_log(ctx, AV_LOG_DEBUG, "dts:%f pts:%f scr:%f stream:%d\n", timestamp_packet->dts/90000.0, timestamp_packet->pts/90000.0, scr/90000.0, best_i);
+ es_size= flush_packet(ctx, best_i, timestamp_packet->pts, timestamp_packet->dts, scr, trailer_size);
+ }else{
+ assert(av_fifo_size(&stream->fifo) == trailer_size);
+ es_size= flush_packet(ctx, best_i, AV_NOPTS_VALUE, AV_NOPTS_VALUE, scr, trailer_size);
}
- stream->start_pts = new_start_pts;
- stream->start_dts = new_start_dts;
- stream->nb_frames++;
- if (stream->frame_start_offset == 0)
- stream->frame_start_offset = stream->buffer_ptr;
- while (size > 0) {
- avail_size = get_packet_payload_size(ctx, stream_index,
- stream->start_pts,
- stream->start_dts);
- len = avail_size - stream->buffer_ptr;
- if (len > size)
- len = size;
- memcpy(stream->buffer + stream->buffer_ptr, buf, len);
- stream->buffer_ptr += len;
- buf += len;
- size -= len;
- if (stream->buffer_ptr >= avail_size) {
- /* if packet full, we send it now */
- flush_packet(ctx, stream_index,
- stream->start_pts, stream->start_dts, s->last_scr);
- stream->buffer_ptr = 0;
- /* Make sure only the FIRST pes packet for this frame has
- a timestamp */
- stream->start_pts = AV_NOPTS_VALUE;
- stream->start_dts = AV_NOPTS_VALUE;
+
+ if (s->is_vcd) {
+ /* Write one or more padding sectors, if necessary, to reach
+ the constant overall bitrate.*/
+ int vcd_pad_bytes;
+
+ while((vcd_pad_bytes = get_vcd_padding_size(ctx,stream->premux_packet->pts) ) >= s->packet_size){ //FIXME pts cannot be correct here
+ put_vcd_padding_sector(ctx);
+ s->last_scr += s->packet_size*90000LL / (s->mux_rate*50LL); //FIXME rounding and first few bytes of each packet
}
}
- return 0;
+ stream->buffer_index += es_size;
+ s->last_scr += s->packet_size*90000LL / (s->mux_rate*50LL); //FIXME rounding and first few bytes of each packet
+
+ while(stream->premux_packet && stream->premux_packet->unwritten_size <= es_size){
+ es_size -= stream->premux_packet->unwritten_size;
+ stream->premux_packet= stream->premux_packet->next;
+ }
+ if(es_size)
+ stream->premux_packet->unwritten_size -= es_size;
+
+ if(remove_decoded_packets(ctx, s->last_scr) < 0)
+ return -1;
+
+ return 1;
}
-static int mpeg_mux_end(AVFormatContext *ctx)
+static int mpeg_mux_write_packet(AVFormatContext *ctx, AVPacket *pkt)
{
MpegMuxContext *s = ctx->priv_data;
+ int stream_index= pkt->stream_index;
+ int size= pkt->size;
+ uint8_t *buf= pkt->data;
+ AVStream *st = ctx->streams[stream_index];
+ StreamInfo *stream = st->priv_data;
+ int64_t pts, dts;
+ PacketDesc *pkt_desc;
+ const int preload= av_rescale(ctx->preload, 90000, AV_TIME_BASE);
+ const int is_iframe = st->codec->codec_type == CODEC_TYPE_VIDEO && (pkt->flags & PKT_FLAG_KEY);
+
+ pts= pkt->pts;
+ dts= pkt->dts;
+
+ if(pts != AV_NOPTS_VALUE) pts += preload;
+ if(dts != AV_NOPTS_VALUE) dts += preload;
+
+//av_log(ctx, AV_LOG_DEBUG, "dts:%f pts:%f flags:%d stream:%d nopts:%d\n", dts/90000.0, pts/90000.0, pkt->flags, pkt->stream_index, pts != AV_NOPTS_VALUE);
+ if (!stream->premux_packet)
+ stream->next_packet = &stream->premux_packet;
+ *stream->next_packet=
+ pkt_desc= av_mallocz(sizeof(PacketDesc));
+ pkt_desc->pts= pts;
+ pkt_desc->dts= dts;
+ pkt_desc->unwritten_size=
+ pkt_desc->size= size;
+ if(!stream->predecode_packet)
+ stream->predecode_packet= pkt_desc;
+ stream->next_packet= &pkt_desc->next;
+
+ av_fifo_realloc(&stream->fifo, av_fifo_size(&stream->fifo) + size + 1);
+
+ if (s->is_dvd){
+ if (is_iframe && (s->packet_number == 0 || (pts - stream->vobu_start_pts >= 36000))) { // min VOBU length 0.4 seconds (mpucoder)
+ stream->bytes_to_iframe = av_fifo_size(&stream->fifo);
+ stream->align_iframe = 1;
+ stream->vobu_start_pts = pts;
+ } else {
+ stream->align_iframe = 0;
+ }
+ }
+
+ av_fifo_write(&stream->fifo, buf, size);
+
+ for(;;){
+ int ret= output_packet(ctx, 0);
+ if(ret<=0)
+ return ret;
+ }
+}
+
+static int mpeg_mux_end(AVFormatContext *ctx)
+{
+// MpegMuxContext *s = ctx->priv_data;
StreamInfo *stream;
int i;
- /* flush each packet */
- for(i=0;i<ctx->nb_streams;i++) {
- stream = ctx->streams[i]->priv_data;
- if (stream->buffer_ptr > 0) {
- /* NOTE: we can always write the remaining data as it was
- tested before in mpeg_mux_write_packet() */
- flush_packet(ctx, i, stream->start_pts, stream->start_dts,
- s->last_scr);
- }
+ for(;;){
+ int ret= output_packet(ctx, 1);
+ if(ret<0)
+ return ret;
+ else if(ret==0)
+ break;
}
/* End header according to MPEG1 systems standard. We do not write
//put_be32(&ctx->pb, ISO_11172_END_CODE);
//put_flush_packet(&ctx->pb);
- for(i=0;i<ctx->nb_streams;i++)
- av_freep(&ctx->streams[i]->priv_data);
+ for(i=0;i<ctx->nb_streams;i++) {
+ stream = ctx->streams[i]->priv_data;
+ assert(av_fifo_size(&stream->fifo) == 0);
+ av_fifo_free(&stream->fifo);
+ }
return 0;
}
-#endif //CONFIG_ENCODERS
+#endif //CONFIG_MUXERS
/*********************************************/
/* demux code */
#define MAX_SYNC_SIZE 100000
-static int mpegps_probe(AVProbeData *p)
+static int cdxa_probe(AVProbeData *p)
{
- int code, c, i;
+ /* check file header */
+ if (p->buf_size <= 32)
+ return 0;
+ if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
+ p->buf[2] == 'F' && p->buf[3] == 'F' &&
+ p->buf[8] == 'C' && p->buf[9] == 'D' &&
+ p->buf[10] == 'X' && p->buf[11] == 'A')
+ return AVPROBE_SCORE_MAX;
+ else
+ return 0;
+}
- code = 0xff;
- /* we search the first start code. If it is a packet start code,
- then we decide it is mpeg ps. We do not send highest value to
- give a chance to mpegts */
- /* NOTE: the search range was restricted to avoid too many false
- detections */
+static int mpegps_probe(AVProbeData *p)
+{
+ uint32_t code= -1;
+ int sys=0, pspack=0, priv1=0, vid=0, audio=0;
+ int i;
+ int score=0;
- if (p->buf_size < 6)
- return 0;
+ score = cdxa_probe(p);
+ if (score > 0) return score;
- for (i = 0; i < 20; i++) {
- c = p->buf[i];
- code = (code << 8) | c;
+ /* Search for MPEG stream */
+ for(i=0; i<p->buf_size; i++){
+ code = (code<<8) + p->buf[i];
if ((code & 0xffffff00) == 0x100) {
- if (code == PACK_START_CODE ||
- code == SYSTEM_HEADER_START_CODE ||
- (code >= 0x1e0 && code <= 0x1ef) ||
- (code >= 0x1c0 && code <= 0x1df) ||
- code == PRIVATE_STREAM_2 ||
- code == PROGRAM_STREAM_MAP ||
- code == PRIVATE_STREAM_1 ||
- code == PADDING_STREAM)
- return AVPROBE_SCORE_MAX - 2;
- else
- return 0;
+ if(code == SYSTEM_HEADER_START_CODE) sys++;
+ else if(code == PRIVATE_STREAM_1) priv1++;
+ else if(code == PACK_START_CODE) pspack++;
+ else if((code & 0xf0) == VIDEO_ID) vid++;
+ else if((code & 0xe0) == AUDIO_ID) audio++;
}
}
- return 0;
+
+ if(vid || audio) /* invalid VDR files nd short PES streams */
+ score= AVPROBE_SCORE_MAX/4;
+
+//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d\n", sys, priv1, pspack,vid, audio);
+ if(sys && sys*9 <= pspack*10)
+ return AVPROBE_SCORE_MAX/2+2; // +1 for .mpg
+ if((priv1 || vid || audio) && (priv1+vid+audio)*9 <= pspack*10)
+ return AVPROBE_SCORE_MAX/2+2; // +1 for .mpg
+ if((!!vid ^ !!audio) && (audio+vid > 1) && !sys && !pspack) /* PES stream */
+ return AVPROBE_SCORE_MAX/2+2;
+
+ //02-Penguin.flac has sys:0 priv1:0 pspack:0 vid:0 audio:1
+ return score;
}
typedef struct MpegDemuxContext {
- int header_state;
+ int32_t header_state;
+ unsigned char psm_es_type[256];
} MpegDemuxContext;
static int mpegps_read_header(AVFormatContext *s,
return pts;
}
-static int find_next_start_code(ByteIOContext *pb, int *size_ptr,
- uint32_t *header_state)
+static int find_next_start_code(ByteIOContext *pb, int *size_ptr,
+ int32_t *header_state)
{
unsigned int state, v;
int val, n;
return val;
}
+#if 0 /* unused, remove? */
/* XXX: optimize */
static int find_prev_start_code(ByteIOContext *pb, int *size_ptr)
{
*size_ptr = pos_start - pos;
return start_code;
}
+#endif
+
+/**
+ * Extracts stream types from a program stream map
+ * According to ISO/IEC 13818-1 ('MPEG-2 Systems') table 2-35
+ *
+ * @return number of bytes occupied by PSM in the bitstream
+ */
+static long mpegps_psm_parse(MpegDemuxContext *m, ByteIOContext *pb)
+{
+ int psm_length, ps_info_length, es_map_length;
+
+ psm_length = get_be16(pb);
+ get_byte(pb);
+ get_byte(pb);
+ ps_info_length = get_be16(pb);
+
+ /* skip program_stream_info */
+ url_fskip(pb, ps_info_length);
+ es_map_length = get_be16(pb);
+
+ /* at least one es available? */
+ while (es_map_length >= 4){
+ unsigned char type = get_byte(pb);
+ unsigned char es_id = get_byte(pb);
+ uint16_t es_info_length = get_be16(pb);
+ /* remember mapping from stream id to stream type */
+ m->psm_es_type[es_id] = type;
+ /* skip program_stream_info */
+ url_fskip(pb, es_info_length);
+ es_map_length -= 4 + es_info_length;
+ }
+ get_be32(pb); /* crc32 */
+ return 2 + psm_length;
+}
-/* read the next (or previous) PES header. Return its position in ppos
+/* read the next PES header. Return its position in ppos
(if not NULL), and its start code, pts and dts.
*/
static int mpegps_read_pes_header(AVFormatContext *s,
- int64_t *ppos, int *pstart_code,
- int64_t *ppts, int64_t *pdts, int find_next)
+ int64_t *ppos, int *pstart_code,
+ int64_t *ppts, int64_t *pdts)
{
MpegDemuxContext *m = s->priv_data;
int len, size, startcode, c, flags, header_len;
last_pos = -1;
redo:
- if (find_next) {
/* next start code (should be immediately after) */
m->header_state = 0xff;
size = MAX_SYNC_SIZE;
startcode = find_next_start_code(&s->pb, &size, &m->header_state);
- } else {
- if (last_pos >= 0)
- url_fseek(&s->pb, last_pos, SEEK_SET);
- size = MAX_SYNC_SIZE;
- startcode = find_prev_start_code(&s->pb, &size);
- last_pos = url_ftell(&s->pb) - 4;
- }
- //printf("startcode=%x pos=0x%Lx\n", startcode, url_ftell(&s->pb));
+ //printf("startcode=%x pos=0x%"PRIx64"\n", startcode, url_ftell(&s->pb));
if (startcode < 0)
- return -EIO;
+ return AVERROR_IO;
if (startcode == PACK_START_CODE)
goto redo;
if (startcode == SYSTEM_HEADER_START_CODE)
url_fskip(&s->pb, len);
goto redo;
}
+ if (startcode == PROGRAM_STREAM_MAP) {
+ mpegps_psm_parse(m, &s->pb);
+ goto redo;
+ }
+
/* find matching stream */
if (!((startcode >= 0x1c0 && startcode <= 0x1df) ||
(startcode >= 0x1e0 && startcode <= 0x1ef) ||
c = get_byte(&s->pb);
len--;
/* XXX: for mpeg1, should test only bit 7 */
- if (c != 0xff)
+ if (c != 0xff)
break;
}
if ((c & 0xc0) == 0x40) {
len -= 9;
} else if ((c & 0xc0) == 0x80) {
/* mpeg 2 PES */
+#if 0 /* some streams have this field set for no apparent reason */
if ((c & 0x30) != 0) {
/* Encrypted multiplex not handled */
goto redo;
}
+#endif
flags = get_byte(&s->pb);
header_len = get_byte(&s->pb);
len -= 2;
header_len--;
}
}
- if (startcode == 0x1bd) {
+ else if( c!= 0xf )
+ goto redo;
+
+ if (startcode == PRIVATE_STREAM_1 && !m->psm_es_type[startcode & 0xff]) {
if (len < 1)
goto redo;
startcode = get_byte(&s->pb);
int i;
for(i=0; i<s->nb_streams; i++){
if(startcode == s->streams[i]->id) {
- av_add_index_entry(s->streams[i], *ppos, dts, 0, 0 /* FIXME keyframe? */);
+ av_add_index_entry(s->streams[i], *ppos, dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
}
}
}
-
+
*pstart_code = startcode;
*ppts = pts;
*pdts = dts;
static int mpegps_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
+ MpegDemuxContext *m = s->priv_data;
AVStream *st;
- int len, startcode, i, type, codec_id;
+ int len, startcode, i, type, codec_id = 0, es_type;
int64_t pts, dts, dummy_pos; //dummy_pos is needed for the index building to work
redo:
- len = mpegps_read_pes_header(s, &dummy_pos, &startcode, &pts, &dts, 1);
+ len = mpegps_read_pes_header(s, &dummy_pos, &startcode, &pts, &dts);
if (len < 0)
return len;
-
+
/* now find stream */
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
if (st->id == startcode)
goto found;
}
- if (startcode >= 0x1e0 && startcode <= 0x1ef) {
+
+ es_type = m->psm_es_type[startcode & 0xff];
+ if(es_type > 0){
+ if(es_type == STREAM_TYPE_VIDEO_MPEG1){
+ codec_id = CODEC_ID_MPEG2VIDEO;
+ type = CODEC_TYPE_VIDEO;
+ } else if(es_type == STREAM_TYPE_VIDEO_MPEG2){
+ codec_id = CODEC_ID_MPEG2VIDEO;
+ type = CODEC_TYPE_VIDEO;
+ } else if(es_type == STREAM_TYPE_AUDIO_MPEG1 ||
+ es_type == STREAM_TYPE_AUDIO_MPEG2){
+ codec_id = CODEC_ID_MP3;
+ type = CODEC_TYPE_AUDIO;
+ } else if(es_type == STREAM_TYPE_AUDIO_AAC){
+ codec_id = CODEC_ID_AAC;
+ type = CODEC_TYPE_AUDIO;
+ } else if(es_type == STREAM_TYPE_VIDEO_MPEG4){
+ codec_id = CODEC_ID_MPEG4;
+ type = CODEC_TYPE_VIDEO;
+ } else if(es_type == STREAM_TYPE_VIDEO_H264){
+ codec_id = CODEC_ID_H264;
+ type = CODEC_TYPE_VIDEO;
+ } else if(es_type == STREAM_TYPE_AUDIO_AC3){
+ codec_id = CODEC_ID_AC3;
+ type = CODEC_TYPE_AUDIO;
+ } else {
+ goto skip;
+ }
+ } else if (startcode >= 0x1e0 && startcode <= 0x1ef) {
+ static const unsigned char avs_seqh[4] = { 0, 0, 1, 0xb0 };
+ unsigned char buf[8];
+ get_buffer(&s->pb, buf, 8);
+ url_fseek(&s->pb, -8, SEEK_CUR);
+ if(!memcmp(buf, avs_seqh, 4) && (buf[6] != 0 || buf[7] != 1))
+ codec_id = CODEC_ID_CAVS;
+ else
+ codec_id = CODEC_ID_MPEG2VIDEO;
type = CODEC_TYPE_VIDEO;
- codec_id = CODEC_ID_MPEG2VIDEO;
} else if (startcode >= 0x1c0 && startcode <= 0x1df) {
type = CODEC_TYPE_AUDIO;
codec_id = CODEC_ID_MP2;
- } else if (startcode >= 0x80 && startcode <= 0x9f) {
+ } else if (startcode >= 0x80 && startcode <= 0x87) {
type = CODEC_TYPE_AUDIO;
codec_id = CODEC_ID_AC3;
+ } else if (startcode >= 0x88 && startcode <= 0x9f) {
+ type = CODEC_TYPE_AUDIO;
+ codec_id = CODEC_ID_DTS;
} else if (startcode >= 0xa0 && startcode <= 0xbf) {
type = CODEC_TYPE_AUDIO;
codec_id = CODEC_ID_PCM_S16BE;
+ } else if (startcode >= 0x20 && startcode <= 0x3f) {
+ type = CODEC_TYPE_SUBTITLE;
+ codec_id = CODEC_ID_DVD_SUBTITLE;
} else {
skip:
/* skip packet */
}
/* no stream found: add a new stream */
st = av_new_stream(s, startcode);
- if (!st)
+ if (!st)
goto skip;
- st->codec.codec_type = type;
- st->codec.codec_id = codec_id;
+ st->codec->codec_type = type;
+ st->codec->codec_id = codec_id;
if (codec_id != CODEC_ID_PCM_S16BE)
st->need_parsing = 1;
found:
+ if(st->discard >= AVDISCARD_ALL)
+ goto skip;
if (startcode >= 0xa0 && startcode <= 0xbf) {
int b1, freq;
get_byte(&s->pb); /* dynamic range control (0x80 = off) */
len -= 3;
freq = (b1 >> 4) & 3;
- st->codec.sample_rate = lpcm_freq_tab[freq];
- st->codec.channels = 1 + (b1 & 7);
- st->codec.bit_rate = st->codec.channels * st->codec.sample_rate * 2;
+ st->codec->sample_rate = lpcm_freq_tab[freq];
+ st->codec->channels = 1 + (b1 & 7);
+ st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * 2;
}
av_new_packet(pkt, len);
get_buffer(&s->pb, pkt->data, pkt->size);
pkt->dts = dts;
pkt->stream_index = st->index;
#if 0
- printf("%d: pts=%0.3f dts=%0.3f\n",
- pkt->stream_index, pkt->pts / 90000.0, pkt->dts / 90000.0);
+ av_log(s, AV_LOG_DEBUG, "%d: pts=%0.3f dts=%0.3f size=%d\n",
+ pkt->stream_index, pkt->pts / 90000.0, pkt->dts / 90000.0, pkt->size);
#endif
+
return 0;
}
return 0;
}
-static int64_t mpegps_read_dts(AVFormatContext *s, int stream_index,
- int64_t *ppos, int find_next)
+static int64_t mpegps_read_dts(AVFormatContext *s, int stream_index,
+ int64_t *ppos, int64_t pos_limit)
{
int len, startcode;
int64_t pos, pts, dts;
pos = *ppos;
#ifdef DEBUG_SEEK
- printf("read_dts: pos=0x%llx next=%d -> ", pos, find_next);
+ printf("read_dts: pos=0x%"PRIx64" next=%d -> ", pos, find_next);
#endif
url_fseek(&s->pb, pos, SEEK_SET);
for(;;) {
- len = mpegps_read_pes_header(s, &pos, &startcode, &pts, &dts, find_next);
+ len = mpegps_read_pes_header(s, &pos, &startcode, &pts, &dts);
if (len < 0) {
#ifdef DEBUG_SEEK
printf("none (ret=%d)\n", len);
#endif
return AV_NOPTS_VALUE;
}
- if (startcode == s->streams[stream_index]->id &&
+ if (startcode == s->streams[stream_index]->id &&
dts != AV_NOPTS_VALUE) {
break;
}
- if (find_next) {
- url_fskip(&s->pb, len);
- } else {
- url_fseek(&s->pb, pos, SEEK_SET);
- }
+ url_fskip(&s->pb, len);
}
#ifdef DEBUG_SEEK
- printf("pos=0x%llx dts=0x%llx %0.3f\n", pos, dts, dts / 90000.0);
+ printf("pos=0x%"PRIx64" dts=0x%"PRIx64" %0.3f\n", pos, dts, dts / 90000.0);
#endif
*ppos = pos;
return dts;
}
-static int mpegps_read_seek(AVFormatContext *s,
- int stream_index, int64_t timestamp)
-{
- int64_t pos_min, pos_max, pos;
- int64_t dts_min, dts_max, dts;
- int index;
- AVStream *st;
-
- timestamp = (timestamp * 90000) / AV_TIME_BASE;
-
-#ifdef DEBUG_SEEK
- printf("read_seek: %d %0.3f\n", stream_index, timestamp / 90000.0);
-#endif
-
- /* XXX: find stream_index by looking at the first PES packet found */
- if (stream_index < 0) {
- stream_index = av_find_default_stream_index(s);
- if (stream_index < 0)
- return -1;
- }
-
- dts_max=
- dts_min= AV_NOPTS_VALUE;
-
- st= s->streams[stream_index];
- if(st->index_entries){
- AVIndexEntry *e;
-
- index= av_index_search_timestamp(st, timestamp);
- e= &st->index_entries[index];
- if(e->timestamp <= timestamp){
- pos_min= e->pos;
- dts_min= e->timestamp;
-#ifdef DEBUG_SEEK
- printf("unsing cached pos_min=0x%llx dts_min=%0.3f\n",
- pos_min,dts_min / 90000.0);
-#endif
- }else{
- assert(index==0);
- }
- index++;
- if(index < st->nb_index_entries){
- e= &st->index_entries[index];
- assert(e->timestamp >= timestamp);
- pos_max= e->pos;
- dts_max= e->timestamp;
-#ifdef DEBUG_SEEK
- printf("unsing cached pos_max=0x%llx dts_max=%0.3f\n",
- pos_max,dts_max / 90000.0);
-#endif
- }
- }
-
- if(dts_min == AV_NOPTS_VALUE){
- pos_min = 0;
- dts_min = mpegps_read_dts(s, stream_index, &pos_min, 1);
- if (dts_min == AV_NOPTS_VALUE) {
- /* we can reach this case only if no PTS are present in
- the whole stream */
- return -1;
- }
- }
- if(dts_max == AV_NOPTS_VALUE){
- pos_max = url_filesize(url_fileno(&s->pb)) - 1;
- dts_max = mpegps_read_dts(s, stream_index, &pos_max, 0);
- }
-
- while (pos_min <= pos_max) {
-#ifdef DEBUG_SEEK
- printf("pos_min=0x%llx pos_max=0x%llx dts_min=%0.3f dts_max=%0.3f\n",
- pos_min, pos_max,
- dts_min / 90000.0, dts_max / 90000.0);
-#endif
- if (timestamp <= dts_min) {
- pos = pos_min;
- goto found;
- } else if (timestamp >= dts_max) {
- pos = pos_max;
- goto found;
- } else {
- /* interpolate position (better than dichotomy) */
- pos = (int64_t)((double)(pos_max - pos_min) *
- (double)(timestamp - dts_min) /
- (double)(dts_max - dts_min)) + pos_min;
- }
-#ifdef DEBUG_SEEK
- printf("pos=0x%llx\n", pos);
-#endif
- /* read the next timestamp */
- dts = mpegps_read_dts(s, stream_index, &pos, 1);
- /* check if we are lucky */
- if (dts == AV_NOPTS_VALUE) {
- /* should never happen */
- pos = pos_min;
- goto found;
- } else if (timestamp == dts) {
- goto found;
- } else if (timestamp < dts) {
- pos_max = pos;
- dts_max = mpegps_read_dts(s, stream_index, &pos_max, 0);
- if (dts_max == AV_NOPTS_VALUE) {
- /* should never happen */
- break;
- } else if (timestamp >= dts_max) {
- pos = pos_max;
- goto found;
- }
- } else {
- pos_min = pos + 1;
- dts_min = mpegps_read_dts(s, stream_index, &pos_min, 1);
- if (dts_min == AV_NOPTS_VALUE) {
- /* should never happen */
- goto found;
- } else if (timestamp <= dts_min) {
- goto found;
- }
- }
- }
- pos = pos_min;
- found:
-#ifdef DEBUG_SEEK
- pos_min = pos;
- dts_min = mpegps_read_dts(s, stream_index, &pos_min, 1);
- pos_min++;
- dts_max = mpegps_read_dts(s, stream_index, &pos_min, 1);
- printf("pos=0x%llx %0.3f<=%0.3f<=%0.3f\n",
- pos, dts_min / 90000.0, timestamp / 90000.0, dts_max / 90000.0);
-#endif
- /* do the seek */
- url_fseek(&s->pb, pos, SEEK_SET);
- return 0;
-}
-
-#ifdef CONFIG_ENCODERS
-static AVOutputFormat mpeg1system_mux = {
+#ifdef CONFIG_MPEG1SYSTEM_MUXER
+AVOutputFormat mpeg1system_muxer = {
"mpeg",
"MPEG1 System format",
"video/mpeg",
mpeg_mux_write_packet,
mpeg_mux_end,
};
-
-static AVOutputFormat mpeg1vcd_mux = {
+#endif
+#ifdef CONFIG_MPEG1VCD_MUXER
+AVOutputFormat mpeg1vcd_muxer = {
"vcd",
"MPEG1 System format (VCD)",
"video/mpeg",
mpeg_mux_write_packet,
mpeg_mux_end,
};
-
-static AVOutputFormat mpeg2vob_mux = {
+#endif
+#ifdef CONFIG_MPEG2VOB_MUXER
+AVOutputFormat mpeg2vob_muxer = {
+ "vob",
+ "MPEG2 PS format (VOB)",
+ "video/mpeg",
"vob",
+ sizeof(MpegMuxContext),
+ CODEC_ID_MP2,
+ CODEC_ID_MPEG2VIDEO,
+ mpeg_mux_init,
+ mpeg_mux_write_packet,
+ mpeg_mux_end,
+};
+#endif
+
+/* Same as mpeg2vob_mux except that the pack size is 2324 */
+#ifdef CONFIG_MPEG2SVCD_MUXER
+AVOutputFormat mpeg2svcd_muxer = {
+ "svcd",
"MPEG2 PS format (VOB)",
"video/mpeg",
"vob",
mpeg_mux_write_packet,
mpeg_mux_end,
};
-#endif //CONFIG_ENCODERS
+#endif
+
+/* Same as mpeg2vob_mux except the 'is_dvd' flag is set to produce NAV pkts */
+#ifdef CONFIG_MPEG2DVD_MUXER
+AVOutputFormat mpeg2dvd_muxer = {
+ "dvd",
+ "MPEG2 PS format (DVD VOB)",
+ "video/mpeg",
+ "dvd",
+ sizeof(MpegMuxContext),
+ CODEC_ID_MP2,
+ CODEC_ID_MPEG2VIDEO,
+ mpeg_mux_init,
+ mpeg_mux_write_packet,
+ mpeg_mux_end,
+};
+#endif
-AVInputFormat mpegps_demux = {
+#ifdef CONFIG_MPEGPS_DEMUXER
+AVInputFormat mpegps_demuxer = {
"mpeg",
"MPEG PS format",
sizeof(MpegDemuxContext),
mpegps_read_header,
mpegps_read_packet,
mpegps_read_close,
- mpegps_read_seek,
+ NULL, //mpegps_read_seek,
+ mpegps_read_dts,
+ .flags = AVFMT_SHOW_IDS,
};
-
-int mpegps_init(void)
-{
-#ifdef CONFIG_ENCODERS
- av_register_output_format(&mpeg1system_mux);
- av_register_output_format(&mpeg1vcd_mux);
- av_register_output_format(&mpeg2vob_mux);
-#endif //CONFIG_ENCODERS
- av_register_input_format(&mpegps_demux);
- return 0;
-}
+#endif
projects / ffmpeg / blobdiff