}
/**
- * Write an EBML size meaning "unknown size"
+ * Write an EBML size meaning "unknown size".
*
- * @param bytes The number of bytes the size should occupy. Maximum of 8.
+ * @param bytes The number of bytes the size should occupy (maximum: 8).
*/
static void put_ebml_size_unknown(ByteIOContext *pb, int bytes)
{
}
/**
- * Calculate how many bytes are needed to represent a given size in EBML.
+ * Calculate how many bytes are needed to represent a given number in EBML.
*/
-static int ebml_size_bytes(uint64_t size)
+static int ebml_num_size(uint64_t num)
{
int bytes = 1;
- while ((size+1) >> bytes*7) bytes++;
+ while ((num+1) >> bytes*7) bytes++;
return bytes;
}
/**
- * Write a size in EBML variable length format.
+ * Write a number in EBML variable length format.
*
- * @param bytes The number of bytes that need to be used to write the size.
+ * @param bytes The number of bytes that need to be used to write the number.
* If zero, any number of bytes can be used.
*/
-static void put_ebml_size(ByteIOContext *pb, uint64_t size, int bytes)
+static void put_ebml_num(ByteIOContext *pb, uint64_t num, int bytes)
{
- int i, needed_bytes = ebml_size_bytes(size);
+ int i, needed_bytes = ebml_num_size(num);
// sizes larger than this are currently undefined in EBML
- // so write "unknown" size
- if (size >= (1ULL<<56)-1) {
- put_ebml_size_unknown(pb, 1);
- return;
- }
+ assert(num < (1ULL<<56)-1);
if (bytes == 0)
// don't care how many bytes are used, so use the min
// that we need to use, so write unknown size. This shouldn't happen.
assert(bytes >= needed_bytes);
- size |= 1ULL << bytes*7;
+ num |= 1ULL << bytes*7;
for (i = bytes - 1; i >= 0; i--)
- put_byte(pb, size >> i*8);
+ put_byte(pb, num >> i*8);
}
static void put_ebml_uint(ByteIOContext *pb, unsigned int elementid, uint64_t val)
while (val >> bytes*8) bytes++;
put_ebml_id(pb, elementid);
- put_ebml_size(pb, bytes, 0);
+ put_ebml_num(pb, bytes, 0);
for (i = bytes - 1; i >= 0; i--)
put_byte(pb, val >> i*8);
}
static void put_ebml_float(ByteIOContext *pb, unsigned int elementid, double val)
{
put_ebml_id(pb, elementid);
- put_ebml_size(pb, 8, 0);
+ put_ebml_num(pb, 8, 0);
put_be64(pb, av_dbl2int(val));
}
const uint8_t *buf, int size)
{
put_ebml_id(pb, elementid);
- put_ebml_size(pb, size, 0);
+ put_ebml_num(pb, size, 0);
put_buffer(pb, buf, size);
}
// size we need to reserve so 2 cases, we use 8 bytes to store the
// size if possible, 1 byte otherwise
if (size < 10)
- put_ebml_size(pb, size-1, 0);
+ put_ebml_num(pb, size-1, 0);
else
- put_ebml_size(pb, size-9, 8);
+ put_ebml_num(pb, size-9, 8);
url_fseek(pb, currentpos + size, SEEK_SET);
}
static ebml_master start_ebml_master(ByteIOContext *pb, unsigned int elementid, uint64_t expectedsize)
{
- int bytes = expectedsize ? ebml_size_bytes(expectedsize) : 8;
+ int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
put_ebml_id(pb, elementid);
put_ebml_size_unknown(pb, bytes);
return (ebml_master){ url_ftell(pb), bytes };
{
offset_t pos = url_ftell(pb);
+ // leave the unknown size for masters when streaming
+ if (url_is_streamed(pb))
+ return;
+
url_fseek(pb, master.pos - master.sizebytes, SEEK_SET);
- put_ebml_size(pb, pos - master.pos, master.sizebytes);
+ put_ebml_num(pb, pos - master.pos, master.sizebytes);
url_fseek(pb, pos, SEEK_SET);
}
* that size.
*
* @param segment_offset The absolute offset to the position in the file
- * where the segment begins
- * @param numelements the maximum number of elements that will be indexed
+ * where the segment begins.
+ * @param numelements The maximum number of elements that will be indexed
* by this seek head, 0 if unlimited.
*/
static mkv_seekhead * mkv_start_seekhead(ByteIOContext *pb, offset_t segment_offset, int numelements)
entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
seekhead->entries = entries;
-
return 0;
}
* be written at the location reserved for it. Otherwise, it is written
* at the current location in the file.
*
- * @return the file offset where the seekhead was written
+ * @return The file offset where the seekhead was written.
*/
static offset_t mkv_write_seekhead(ByteIOContext *pb, mkv_seekhead *seekhead)
{
seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
put_ebml_id(pb, MATROSKA_ID_SEEKID);
- put_ebml_size(pb, ebml_id_size(entry->elementid), 0);
+ put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
put_ebml_id(pb, entry->elementid);
put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
return currentpos;
}
-static int put_xiph_codecpriv(ByteIOContext *pb, AVCodecContext *codec)
+static int put_xiph_codecpriv(AVFormatContext *s, ByteIOContext *pb, AVCodecContext *codec)
{
- ebml_master codecprivate;
uint8_t *header_start[3];
int header_len[3];
int first_header_size;
if (ff_split_xiph_headers(codec->extradata, codec->extradata_size,
first_header_size, header_start, header_len) < 0) {
- av_log(codec, AV_LOG_ERROR, "Extradata corrupt.\n");
+ av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
return -1;
}
- codecprivate = start_ebml_master(pb, MATROSKA_ID_CODECPRIVATE, 0);
put_byte(pb, 2); // number packets - 1
for (j = 0; j < 2; j++) {
put_xiph_size(pb, header_len[j]);
}
for (j = 0; j < 3; j++)
put_buffer(pb, header_start[j], header_len[j]);
- end_ebml_master(pb, codecprivate);
return 0;
}
#define FLAC_STREAMINFO_SIZE 34
-static int put_flac_codecpriv(ByteIOContext *pb, AVCodecContext *codec)
+static int put_flac_codecpriv(AVFormatContext *s, ByteIOContext *pb, AVCodecContext *codec)
{
- ebml_master codecpriv = start_ebml_master(pb, MATROSKA_ID_CODECPRIVATE, 0);
-
// if the extradata_size is greater than FLAC_STREAMINFO_SIZE,
// assume that it's in Matroska's format already
if (codec->extradata_size < FLAC_STREAMINFO_SIZE) {
- av_log(codec, AV_LOG_ERROR, "Invalid FLAC extradata\n");
+ av_log(s, AV_LOG_ERROR, "Invalid FLAC extradata\n");
return -1;
} else if (codec->extradata_size == FLAC_STREAMINFO_SIZE) {
// only the streaminfo packet
put_byte(pb, 0);
put_xiph_size(pb, codec->extradata_size);
- av_log(codec, AV_LOG_ERROR, "Only one packet\n");
+ av_log(s, AV_LOG_ERROR, "Only one packet\n");
}
put_buffer(pb, codec->extradata, codec->extradata_size);
- end_ebml_master(pb, codecpriv);
return 0;
}
-static void get_aac_sample_rates(AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
+static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
{
static const int aac_sample_rates[] = {
96000, 88200, 64000, 48000, 44100, 32000,
int sri;
if (codec->extradata_size < 2) {
- av_log(codec, AV_LOG_WARNING, "no AAC extradata, unable to determine samplerate\n");
+ av_log(s, AV_LOG_WARNING, "No AAC extradata, unable to determine samplerate.\n");
return;
}
sri = ((codec->extradata[0] << 1) & 0xE) | (codec->extradata[1] >> 7);
if (sri > 12) {
- av_log(codec, AV_LOG_WARNING, "AAC samplerate index out of bounds\n");
+ av_log(s, AV_LOG_WARNING, "AAC samplerate index out of bounds\n");
return;
}
*sample_rate = aac_sample_rates[sri];
if (codec->extradata_size == 5) {
sri = (codec->extradata[4] >> 3) & 0xF;
if (sri > 12) {
- av_log(codec, AV_LOG_WARNING, "AAC output samplerate index out of bounds\n");
+ av_log(s, AV_LOG_WARNING, "AAC output samplerate index out of bounds\n");
return;
}
*output_sample_rate = aac_sample_rates[sri];
}
}
+static int mkv_write_codecprivate(AVFormatContext *s, ByteIOContext *pb, AVCodecContext *codec, int native_id)
+{
+ ByteIOContext dyn_cp;
+ uint8_t *codecpriv;
+ int ret = 0, codecpriv_size;
+
+ url_open_dyn_buf(&dyn_cp);
+
+ if (native_id) {
+ if (codec->codec_id == CODEC_ID_VORBIS || codec->codec_id == CODEC_ID_THEORA)
+ ret = put_xiph_codecpriv(s, &dyn_cp, codec);
+ else if (codec->codec_id == CODEC_ID_FLAC)
+ ret = put_flac_codecpriv(s, &dyn_cp, codec);
+ else if (codec->extradata_size)
+ put_buffer(&dyn_cp, codec->extradata, codec->extradata_size);
+ } else if (codec->codec_type == CODEC_TYPE_VIDEO) {
+ if (!codec->codec_tag)
+ codec->codec_tag = codec_get_tag(codec_bmp_tags, codec->codec_id);
+ if (!codec->codec_tag) {
+ av_log(s, AV_LOG_ERROR, "No bmp codec ID found.");
+ ret = -1;
+ }
+
+ put_bmp_header(&dyn_cp, codec, codec_bmp_tags, 0);
+
+ } else if (codec->codec_type == CODEC_TYPE_AUDIO) {
+ if (!codec->codec_tag)
+ codec->codec_tag = codec_get_tag(codec_wav_tags, codec->codec_id);
+ if (!codec->codec_tag) {
+ av_log(s, AV_LOG_ERROR, "No wav codec ID found.");
+ ret = -1;
+ }
+
+ put_wav_header(&dyn_cp, codec);
+ }
+
+ codecpriv_size = url_close_dyn_buf(&dyn_cp, &codecpriv);
+ if (codecpriv_size)
+ put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size);
+ av_free(codecpriv);
+ return ret;
+}
+
static int mkv_write_tracks(AVFormatContext *s)
{
MatroskaMuxContext *mkv = s->priv_data;
bit_depth = av_get_bits_per_sample_format(codec->sample_fmt);
if (codec->codec_id == CODEC_ID_AAC)
- get_aac_sample_rates(codec, &sample_rate, &output_sample_rate);
+ get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER , i + 1);
else
put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, "und");
- // look for a codec id string specific to mkv to use,
+ // look for a codec ID string specific to mkv to use,
// if none are found, use AVI codes
for (j = 0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++) {
if (ff_mkv_codec_tags[j].id == codec->codec_id) {
}
}
- if (native_id) {
- if (codec->codec_id == CODEC_ID_VORBIS || codec->codec_id == CODEC_ID_THEORA) {
- ret = put_xiph_codecpriv(pb, codec);
- if (ret < 0) return ret;
- } else if (codec->codec_id == CODEC_ID_FLAC) {
- ret = put_flac_codecpriv(pb, codec);
- if (ret < 0) return ret;
- } else if (codec->extradata_size) {
- put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codec->extradata, codec->extradata_size);
- }
- }
-
switch (codec->codec_type) {
case CODEC_TYPE_VIDEO:
put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
- if (!native_id) {
- ebml_master bmp_header;
- // if there is no mkv-specific codec id, use VFW mode
- if (!codec->codec_tag)
- codec->codec_tag = codec_get_tag(codec_bmp_tags, codec->codec_id);
-
+ if (!native_id)
+ // if there is no mkv-specific codec ID, use VFW mode
put_ebml_string(pb, MATROSKA_ID_CODECID, MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC);
- bmp_header = start_ebml_master(pb, MATROSKA_ID_CODECPRIVATE, 0);
- put_bmp_header(pb, codec, codec_bmp_tags, 0);
- end_ebml_master(pb, bmp_header);
- }
+
subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
// XXX: interlace flag?
put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
case CODEC_TYPE_AUDIO:
put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
- if (!native_id) {
- ebml_master wav_header;
+ if (!native_id)
// no mkv-specific ID, use ACM mode
- codec->codec_tag = codec_get_tag(codec_wav_tags, codec->codec_id);
- if (!codec->codec_tag) {
- av_log(s, AV_LOG_ERROR, "no codec id found for stream %d", i);
- return -1;
- }
-
put_ebml_string(pb, MATROSKA_ID_CODECID, MATROSKA_CODEC_ID_AUDIO_ACM);
- wav_header = start_ebml_master(pb, MATROSKA_ID_CODECPRIVATE, 0);
- put_wav_header(pb, codec);
- end_ebml_master(pb, wav_header);
- }
+
subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.");
break;
}
+ ret = mkv_write_codecprivate(s, pb, codec, native_id);
+ if (ret < 0) return ret;
+
end_ebml_master(pb, track);
// ms precision is the de-facto standard timescale for mkv files
static int mkv_blockgroup_size(AVPacket *pkt)
{
int size = mkv_block_size(pkt);
- size += ebml_size_bytes(size);
+ size += ebml_num_size(size);
size += 2; // EBML ID for block and block duration
size += 8; // max size of block duration
- size += ebml_size_bytes(size);
+ size += ebml_num_size(size);
size += 1; // blockgroup EBML ID
return size;
}
"pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
url_ftell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
put_ebml_id(pb, blockid);
- put_ebml_size(pb, mkv_block_size(pkt), 0);
+ put_ebml_num(pb, mkv_block_size(pkt), 0);
put_byte(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
put_be16(pb, pkt->pts - mkv->cluster_pts);
put_byte(pb, flags);
end_ebml_master(pb, mkv->cluster);
- cuespos = mkv_write_cues(pb, mkv->cues, s->nb_streams);
- second_seekhead = mkv_write_seekhead(pb, mkv->cluster_seekhead);
-
- ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES , cuespos);
- if (ret < 0) return ret;
- ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_SEEKHEAD, second_seekhead);
- if (ret < 0) return ret;
- mkv_write_seekhead(pb, mkv->main_seekhead);
+ if (!url_is_streamed(pb)) {
+ cuespos = mkv_write_cues(pb, mkv->cues, s->nb_streams);
+ second_seekhead = mkv_write_seekhead(pb, mkv->cluster_seekhead);
- // update the duration
- av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
- currentpos = url_ftell(pb);
- url_fseek(pb, mkv->duration_offset, SEEK_SET);
- put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
-
- // write the md5sum of some frames as the segment UID
- if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
- uint8_t segment_uid[16];
- av_md5_final(mkv->md5_ctx, segment_uid);
- url_fseek(pb, mkv->segment_uid, SEEK_SET);
- put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
+ ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES , cuespos);
+ if (ret < 0) return ret;
+ ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_SEEKHEAD, second_seekhead);
+ if (ret < 0) return ret;
+ mkv_write_seekhead(pb, mkv->main_seekhead);
+
+ // update the duration
+ av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
+ currentpos = url_ftell(pb);
+ url_fseek(pb, mkv->duration_offset, SEEK_SET);
+ put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
+
+ // write the md5sum of some frames as the segment UID
+ if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
+ uint8_t segment_uid[16];
+ av_md5_final(mkv->md5_ctx, segment_uid);
+ url_fseek(pb, mkv->segment_uid, SEEK_SET);
+ put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
+ }
+ url_fseek(pb, currentpos, SEEK_SET);
}
- url_fseek(pb, currentpos, SEEK_SET);
end_ebml_master(pb, mkv->segment);
av_free(mkv->md5_ctx);
projects / ffmpeg / blobdiff