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parts of the dvd patch from ("Chris" <chris <at< garveycocker >dot< com> and Paul Curtis <pfc >at> terrapin <dot< com>)

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Originally committed as revision 3700 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-11-21 03:37:33 +00:00
parent 6813f1d5cf
commit cbb6e405c0
2 changed files with 106 additions and 28 deletions
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3
ffmpeg.c
View File

@ -3763,6 +3763,9 @@ static void opt_target(const char *arg)
video_rc_min_rate = 0; //1500000;
video_rc_buffer_size = 224*1024*8;
mux_packet_size= 2048; // from www.mpucoder.com: DVD sectors contain 2048 bytes of data, this is also the size of one pack.
mux_rate = 10080000; // from mplex project: data_rate = 1260000. mux_rate = data_rate * 8
audio_bit_rate = 448000;
audio_sample_rate = 48000;

131
libavformat/mpeg.c
View File

@ -44,6 +44,8 @@ typedef struct {
int packet_number;
uint8_t lpcm_header[3];
int lpcm_align;
uint8_t *fifo_iframe_ptr;
int align_iframe;
} StreamInfo;
typedef struct {
@ -161,7 +163,7 @@ static int put_system_header(AVFormatContext *ctx, uint8_t *buf,int only_for_str
put_bits(&pb, 1, 0); /* non constrainted bit stream */
}
if (s->is_vcd) {
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 */
@ -177,41 +179,99 @@ static int put_system_header(AVFormatContext *ctx, uint8_t *buf,int only_for_str
put_bits(&pb, 5, 0);
} else
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;
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) {
/* 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) {
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 < 0xc0) {
/* special case for private streams (AC3 use that) */
if (private_stream_coded)
continue;
private_stream_coded = 1;
id = 0xbd;
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 */
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);
}
/* video */
put_bits(&pb, 8, 0xb9); /* stream ID */
put_bits(&pb, 2, 3);
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 */
@ -225,6 +285,10 @@ static int get_system_header_size(AVFormatContext *ctx)
{
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;
@ -1024,6 +1088,7 @@ static int mpeg_mux_write_packet(AVFormatContext *ctx, AVPacket *pkt)
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;
@ -1046,6 +1111,16 @@ static int mpeg_mux_write_packet(AVFormatContext *ctx, AVPacket *pkt)
av_log(ctx, AV_LOG_ERROR, "fifo overflow\n");
return -1;
}
if (s->is_dvd){
if (is_iframe) {
stream->fifo_iframe_ptr = stream->fifo.wptr;
stream->align_iframe = 1;
} else {
stream->align_iframe = 0;
}
}
fifo_write(&stream->fifo, buf, size, &stream->fifo.wptr);
for(;;){