*/
#include "libavutil/fifo.h"
+#include "libavutil/log.h"
#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
#include "libavcodec/put_bits.h"
#include "avformat.h"
+#include "internal.h"
#include "mpeg.h"
#define MAX_PAYLOAD_SIZE 4096
} StreamInfo;
typedef struct {
+ const AVClass *class;
int packet_size; /* required packet size */
int packet_number;
int pack_header_freq; /* frequency (in packets^-1) at which we send pack headers */
double vcd_padding_bitrate; //FIXME floats
int64_t vcd_padding_bytes_written;
+ int preload;
} MpegMuxContext;
extern AVOutputFormat ff_mpeg1vcd_muxer;
s->packet_size = ctx->packet_size;
} else
s->packet_size = 2048;
+ if (ctx->max_delay < 0) /* Not set by the caller */
+ ctx->max_delay = 0;
s->vcd_padding_bytes_written = 0;
s->vcd_padding_bitrate=0;
goto fail;
st->priv_data = stream;
- av_set_pts_info(st, 64, 1, 90000);
+ avpriv_set_pts_info(st, 64, 1, 90000);
switch(st->codec->codec_type) {
case AVMEDIA_TYPE_AUDIO:
- if (st->codec->codec_id == CODEC_ID_AC3) {
+ if (st->codec->codec_id == AV_CODEC_ID_AC3) {
stream->id = ac3_id++;
- } else if (st->codec->codec_id == CODEC_ID_DTS) {
+ } else if (st->codec->codec_id == AV_CODEC_ID_DTS) {
stream->id = dts_id++;
- } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
+ } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
stream->id = lpcm_id++;
for(j = 0; j < 4; j++) {
if (lpcm_freq_tab[j] == st->codec->sample_rate)
av_log(ctx, AV_LOG_WARNING, "VBV buffer size not set, muxing may fail\n");
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 AVMEDIA_TYPE_SUBTITLE:
video_bitrate += codec_rate;
}
- if(ctx->mux_rate){
- s->mux_rate= (ctx->mux_rate + (8 * 50) - 1) / (8 * 50);
- } else {
+ if (!s->mux_rate) {
/* we increase slightly the bitrate to take into account the
headers. XXX: compute it exactly */
- bitrate += bitrate*5/100;
+ bitrate += bitrate / 20;
bitrate += 10000;
s->mux_rate = (bitrate + (8 * 50) - 1) / (8 * 50);
}
}
-#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. */
-static int get_packet_payload_size(AVFormatContext *ctx, int stream_index,
- int64_t pts, int64_t dts)
-{
- MpegMuxContext *s = ctx->priv_data;
- 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)
- buf_index += 14;
- else
- buf_index += 12;
-
- 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;
- }
- }
-
- 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;
- 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) {
- /* AC-3/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 & 0xe0) == 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;
-}
-#endif
-
/* Write an MPEG padding packet header. */
static void put_padding_packet(AVFormatContext *ctx, AVIOContext *pb,int packet_bytes)
{
if (stuffing_size < 0)
stuffing_size = 0;
+
+ if (startcode == PRIVATE_STREAM_1 && id >= 0xa0) {
+ if (payload_size < av_fifo_size(stream->fifo))
+ stuffing_size += payload_size % stream->lpcm_align;
+ }
+
if (stuffing_size > 16) { /*<=16 for MPEG-1, <=32 for MPEG-2*/
pad_packet_bytes += stuffing_size;
packet_size -= stuffing_size;
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;
}
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);
+ av_dlog(ctx, "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);
StreamInfo *stream = st->priv_data;
int64_t pts, dts;
PacketDesc *pkt_desc;
- const int preload= av_rescale(ctx->preload, 90000, AV_TIME_BASE);
+ int preload;
const int is_iframe = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (pkt->flags & AV_PKT_FLAG_KEY);
+ preload = av_rescale(s->preload, 90000, AV_TIME_BASE);
+
pts= pkt->pts;
dts= pkt->dts;
dts += 2*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);
+ av_dlog(ctx, "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=
return 0;
}
+#define OFFSET(x) offsetof(MpegMuxContext, x)
+#define E AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+ { "muxrate", NULL, OFFSET(mux_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
+ { "preload", "Initial demux-decode delay in microseconds.", OFFSET(preload), AV_OPT_TYPE_INT, {.i64 = 500000}, 0, INT_MAX, E},
+ { NULL },
+};
+
+#define MPEGENC_CLASS(flavor)\
+static const AVClass flavor ## _class = {\
+ .class_name = #flavor " muxer",\
+ .item_name = av_default_item_name,\
+ .version = LIBAVUTIL_VERSION_INT,\
+ .option = options,\
+};
+
#if CONFIG_MPEG1SYSTEM_MUXER
+MPEGENC_CLASS(mpeg)
AVOutputFormat ff_mpeg1system_muxer = {
.name = "mpeg",
- .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 System format"),
+ .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 Systems / MPEG program stream"),
.mime_type = "video/mpeg",
.extensions = "mpg,mpeg",
.priv_data_size = sizeof(MpegMuxContext),
- .audio_codec = CODEC_ID_MP2,
- .video_codec = CODEC_ID_MPEG1VIDEO,
+ .audio_codec = AV_CODEC_ID_MP2,
+ .video_codec = AV_CODEC_ID_MPEG1VIDEO,
.write_header = mpeg_mux_init,
.write_packet = mpeg_mux_write_packet,
.write_trailer = mpeg_mux_end,
+ .priv_class = &mpeg_class,
};
#endif
#if CONFIG_MPEG1VCD_MUXER
+MPEGENC_CLASS(vcd)
AVOutputFormat ff_mpeg1vcd_muxer = {
.name = "vcd",
- .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 System format (VCD)"),
+ .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 Systems / MPEG program stream (VCD)"),
.mime_type = "video/mpeg",
.priv_data_size = sizeof(MpegMuxContext),
- .audio_codec = CODEC_ID_MP2,
- .video_codec = CODEC_ID_MPEG1VIDEO,
+ .audio_codec = AV_CODEC_ID_MP2,
+ .video_codec = AV_CODEC_ID_MPEG1VIDEO,
.write_header = mpeg_mux_init,
.write_packet = mpeg_mux_write_packet,
.write_trailer = mpeg_mux_end,
+ .priv_class = &vcd_class,
};
#endif
#if CONFIG_MPEG2VOB_MUXER
+MPEGENC_CLASS(vob)
AVOutputFormat ff_mpeg2vob_muxer = {
.name = "vob",
- .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 PS format (VOB)"),
+ .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 PS (VOB)"),
.mime_type = "video/mpeg",
.extensions = "vob",
.priv_data_size = sizeof(MpegMuxContext),
- .audio_codec = CODEC_ID_MP2,
- .video_codec = CODEC_ID_MPEG2VIDEO,
+ .audio_codec = AV_CODEC_ID_MP2,
+ .video_codec = AV_CODEC_ID_MPEG2VIDEO,
.write_header = mpeg_mux_init,
.write_packet = mpeg_mux_write_packet,
.write_trailer = mpeg_mux_end,
+ .priv_class = &vob_class,
};
#endif
/* Same as mpeg2vob_mux except that the pack size is 2324 */
#if CONFIG_MPEG2SVCD_MUXER
+MPEGENC_CLASS(svcd)
AVOutputFormat ff_mpeg2svcd_muxer = {
.name = "svcd",
- .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 PS format (VOB)"),
+ .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 PS (SVCD)"),
.mime_type = "video/mpeg",
.extensions = "vob",
.priv_data_size = sizeof(MpegMuxContext),
- .audio_codec = CODEC_ID_MP2,
- .video_codec = CODEC_ID_MPEG2VIDEO,
+ .audio_codec = AV_CODEC_ID_MP2,
+ .video_codec = AV_CODEC_ID_MPEG2VIDEO,
.write_header = mpeg_mux_init,
.write_packet = mpeg_mux_write_packet,
.write_trailer = mpeg_mux_end,
+ .priv_class = &svcd_class,
};
#endif
/* Same as mpeg2vob_mux except the 'is_dvd' flag is set to produce NAV pkts */
#if CONFIG_MPEG2DVD_MUXER
+MPEGENC_CLASS(dvd)
AVOutputFormat ff_mpeg2dvd_muxer = {
.name = "dvd",
- .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 PS format (DVD VOB)"),
+ .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 PS (DVD VOB)"),
.mime_type = "video/mpeg",
.extensions = "dvd",
.priv_data_size = sizeof(MpegMuxContext),
- .audio_codec = CODEC_ID_MP2,
- .video_codec = CODEC_ID_MPEG2VIDEO,
+ .audio_codec = AV_CODEC_ID_MP2,
+ .video_codec = AV_CODEC_ID_MPEG2VIDEO,
.write_header = mpeg_mux_init,
.write_packet = mpeg_mux_write_packet,
.write_trailer = mpeg_mux_end,
+ .priv_class = &dvd_class,
};
#endif
projects / ffmpeg / blobdiff