uint32_t current_block;
uint32_t samples_per_block;
uint32_t last_block_used_bytes;
+ uint32_t last_block_size;
+ uint32_t last_block_samples;
+ uint32_t data_start;
uint8_t *table;
uint8_t *adpc;
+ int little_endian;
} BRSTMDemuxContext;
static int probe(AVProbeData *p)
return 0;
}
+static int probe_bfstm(AVProbeData *p)
+{
+ if ((AV_RL32(p->buf) == MKTAG('F','S','T','M') ||
+ AV_RL32(p->buf) == MKTAG('C','S','T','M')) &&
+ (AV_RL16(p->buf + 4) == 0xFFFE ||
+ AV_RL16(p->buf + 4) == 0xFEFF))
+ return AVPROBE_SCORE_MAX / 3 * 2;
+ return 0;
+}
+
static int read_close(AVFormatContext *s)
{
BRSTMDemuxContext *b = s->priv_data;
return 0;
}
+static av_always_inline unsigned int read16(AVFormatContext *s)
+{
+ BRSTMDemuxContext *b = s->priv_data;
+ if (b->little_endian)
+ return avio_rl16(s->pb);
+ else
+ return avio_rb16(s->pb);
+}
+
+static av_always_inline unsigned int read32(AVFormatContext *s)
+{
+ BRSTMDemuxContext *b = s->priv_data;
+ if (b->little_endian)
+ return avio_rl32(s->pb);
+ else
+ return avio_rb32(s->pb);
+}
+
static int read_header(AVFormatContext *s)
{
BRSTMDemuxContext *b = s->priv_data;
int bom, major, minor, codec, chunk;
- int64_t pos, h1offset, toffset;
- uint32_t size, start, asize;
+ int64_t h1offset, pos, toffset;
+ uint32_t size, asize, start = 0;
AVStream *st;
int ret = AVERROR_EOF;
+ int loop = 0;
+ int bfstm = !strcmp("bfstm", s->iformat->name);
st = avformat_new_stream(s, NULL);
if (!st)
av_log(s, AV_LOG_ERROR, "invalid byte order: %X\n", bom);
return AVERROR_INVALIDDATA;
}
- if (bom == 0xFFFE) {
- avpriv_request_sample(s, "little endian byte order");
- return AVERROR_PATCHWELCOME;
- }
- major = avio_r8(s->pb);
- minor = avio_r8(s->pb);
- avio_skip(s->pb, 4); // size of file
- size = avio_rb16(s->pb);
- if (size < 14)
- return AVERROR_INVALIDDATA;
+ if (bom == 0xFFFE)
+ b->little_endian = 1;
- avio_skip(s->pb, size - 14);
- pos = avio_tell(s->pb);
- if (avio_rl32(s->pb) != MKTAG('H','E','A','D'))
- return AVERROR_INVALIDDATA;
- size = avio_rb32(s->pb);
- if (size < 256)
+ if (!bfstm) {
+ major = avio_r8(s->pb);
+ minor = avio_r8(s->pb);
+ avio_skip(s->pb, 4); // size of file
+ size = read16(s);
+ if (size < 14)
+ return AVERROR_INVALIDDATA;
+
+ avio_skip(s->pb, size - 14);
+ pos = avio_tell(s->pb);
+ if (avio_rl32(s->pb) != MKTAG('H','E','A','D'))
+ return AVERROR_INVALIDDATA;
+ } else {
+ uint32_t info_offset = 0, info_size;
+ uint16_t section_count, header_size, i;
+
+ header_size = read16(s); // 6
+
+ avio_skip(s->pb, 4); // Unknown constant 0x00030000
+ avio_skip(s->pb, 4); // size of file
+ section_count = read16(s);
+ avio_skip(s->pb, 2); // padding
+ for (i = 0; avio_tell(s->pb) < header_size
+ && !(start && info_offset)
+ && i < section_count; i++) {
+ uint16_t flag = read16(s);
+ avio_skip(s->pb, 2);
+ switch (flag) {
+ case 0x4000:
+ info_offset = read32(s);
+ info_size = read32(s);
+ break;
+ case 0x4001:
+ avio_skip(s->pb, 4); // seek offset
+ avio_skip(s->pb, 4); // seek size
+ break;
+ case 0x4002:
+ start = read32(s) + 8;
+ avio_skip(s->pb, 4); //data_size = read32(s);
+ break;
+ case 0x4003:
+ avio_skip(s->pb, 4); // REGN offset
+ avio_skip(s->pb, 4); // REGN size
+ break;
+ }
+ }
+
+ if (!info_offset || !start)
+ return AVERROR_INVALIDDATA;
+
+ avio_skip(s->pb, info_offset - avio_tell(s->pb));
+ pos = avio_tell(s->pb);
+ if (avio_rl32(s->pb) != MKTAG('I','N','F','O'))
+ return AVERROR_INVALIDDATA;
+ }
+
+ size = read32(s);
+ if (size < 192)
return AVERROR_INVALIDDATA;
avio_skip(s->pb, 4); // unknown
- h1offset = avio_rb32(s->pb);
+ h1offset = read32(s);
if (h1offset > size)
return AVERROR_INVALIDDATA;
avio_skip(s->pb, 12);
- toffset = avio_rb32(s->pb) + 16LL;
+ toffset = read32(s) + 16LL;
if (toffset > size)
return AVERROR_INVALIDDATA;
switch (codec) {
case 0: codec = AV_CODEC_ID_PCM_S8_PLANAR; break;
- case 1: codec = AV_CODEC_ID_PCM_S16BE_PLANAR; break;
- case 2: codec = AV_CODEC_ID_ADPCM_THP; break;
+ case 1: codec = b->little_endian ?
+ AV_CODEC_ID_PCM_S16LE_PLANAR :
+ AV_CODEC_ID_PCM_S16BE_PLANAR; break;
+ case 2: codec = b->little_endian ?
+ AV_CODEC_ID_ADPCM_THP_LE :
+ AV_CODEC_ID_ADPCM_THP; break;
default:
avpriv_request_sample(s, "codec %d", codec);
return AVERROR_PATCHWELCOME;
}
- avio_skip(s->pb, 1); // loop flag
+ loop = avio_r8(s->pb); // loop flag
st->codec->codec_id = codec;
st->codec->channels = avio_r8(s->pb);
if (!st->codec->channels)
return AVERROR_INVALIDDATA;
avio_skip(s->pb, 1); // padding
- st->codec->sample_rate = avio_rb16(s->pb);
+
+ st->codec->sample_rate = bfstm ? read32(s) : read16(s);
if (!st->codec->sample_rate)
return AVERROR_INVALIDDATA;
- avio_skip(s->pb, 2); // padding
- avio_skip(s->pb, 4); // loop start sample
+ if (!bfstm)
+ avio_skip(s->pb, 2); // padding
+
+ if (loop) {
+ if (av_dict_set_int(&s->metadata, "loop_start",
+ av_rescale(read32(s), AV_TIME_BASE,
+ st->codec->sample_rate),
+ 0) < 0)
+ return AVERROR(ENOMEM);
+ } else {
+ avio_skip(s->pb, 4);
+ }
+
st->start_time = 0;
- st->duration = avio_rb32(s->pb);
+ st->duration = read32(s);
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
- start = avio_rb32(s->pb);
+ if (!bfstm)
+ start = read32(s);
b->current_block = 0;
- b->block_count = avio_rb32(s->pb);
+ b->block_count = read32(s);
if (b->block_count > UINT16_MAX) {
av_log(s, AV_LOG_WARNING, "too many blocks: %u\n", b->block_count);
return AVERROR_INVALIDDATA;
}
- b->block_size = avio_rb32(s->pb);
- if (b->block_size > UINT16_MAX / st->codec->channels)
+ b->block_size = read32(s);
+ if (b->block_size > UINT32_MAX / st->codec->channels)
return AVERROR_INVALIDDATA;
- b->block_size *= st->codec->channels;
- b->samples_per_block = avio_rb32(s->pb);
- b->last_block_used_bytes = avio_rb32(s->pb);
- if (b->last_block_used_bytes > UINT16_MAX / st->codec->channels)
+ b->samples_per_block = read32(s);
+ b->last_block_used_bytes = read32(s);
+ b->last_block_samples = read32(s);
+ b->last_block_size = read32(s);
+ if (b->last_block_size > UINT32_MAX / st->codec->channels)
+ return AVERROR_INVALIDDATA;
+ if (b->last_block_used_bytes > b->last_block_size)
return AVERROR_INVALIDDATA;
- b->last_block_used_bytes *= st->codec->channels;
- avio_skip(s->pb, 4); // last block samples
- avio_skip(s->pb, 4); // last block size
- if (codec == AV_CODEC_ID_ADPCM_THP) {
+ if (codec == AV_CODEC_ID_ADPCM_THP || codec == AV_CODEC_ID_ADPCM_THP_LE) {
int ch;
avio_skip(s->pb, pos + toffset - avio_tell(s->pb));
- toffset = avio_rb32(s->pb) + 16LL;
+ if (!bfstm)
+ toffset = read32(s) + 16LL;
+ else
+ toffset = toffset + read32(s) + st->codec->channels * 8 - 8;
if (toffset > size)
return AVERROR_INVALIDDATA;
ret = AVERROR_INVALIDDATA;
goto fail;
}
- avio_skip(s->pb, 24);
+ avio_skip(s->pb, bfstm ? 14 : 24);
}
}
ret = AVERROR_INVALIDDATA;
goto fail;
}
+
avio_skip(s->pb, size - (avio_tell(s->pb) - pos));
while (!avio_feof(s->pb)) {
chunk = avio_rl32(s->pb);
- size = avio_rb32(s->pb);
+ size = read32(s);
if (size < 8) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
size -= 8;
switch (chunk) {
+ case MKTAG('S','E','E','K'):
case MKTAG('A','D','P','C'):
- if (codec != AV_CODEC_ID_ADPCM_THP)
+ if (codec != AV_CODEC_ID_ADPCM_THP &&
+ codec != AV_CODEC_ID_ADPCM_THP_LE)
goto skip;
asize = b->block_count * st->codec->channels * 4;
ret = AVERROR(ENOMEM);
goto fail;
}
- avio_read(s->pb, b->adpc, asize);
+ if (bfstm && codec != AV_CODEC_ID_ADPCM_THP_LE) {
+ // Big-endian BFSTMs have little-endian SEEK tables
+ // for some strange reason.
+ int i;
+ for (i = 0; i < asize; i += 2) {
+ b->adpc[i+1] = avio_r8(s->pb);
+ b->adpc[i] = avio_r8(s->pb);
+ }
+ } else {
+ avio_read(s->pb, b->adpc, asize);
+ }
avio_skip(s->pb, size - asize);
}
break;
case MKTAG('D','A','T','A'):
if ((start < avio_tell(s->pb)) ||
- (!b->adpc && codec == AV_CODEC_ID_ADPCM_THP)) {
+ (!b->adpc && (codec == AV_CODEC_ID_ADPCM_THP ||
+ codec == AV_CODEC_ID_ADPCM_THP_LE))) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
avio_skip(s->pb, start - avio_tell(s->pb));
- if (major != 1 || minor)
+ if (bfstm && (codec == AV_CODEC_ID_ADPCM_THP ||
+ codec == AV_CODEC_ID_ADPCM_THP_LE))
+ avio_skip(s->pb, 24);
+
+ b->data_start = avio_tell(s->pb);
+
+ if (!bfstm && (major != 1 || minor))
avpriv_request_sample(s, "Version %d.%d", major, minor);
return 0;
{
AVCodecContext *codec = s->streams[0]->codec;
BRSTMDemuxContext *b = s->priv_data;
- uint32_t samples, size;
- int ret;
+ uint32_t samples, size, skip = 0;
+ int ret, i;
if (avio_feof(s->pb))
return AVERROR_EOF;
b->current_block++;
if (b->current_block == b->block_count) {
size = b->last_block_used_bytes;
- samples = size / (8 * codec->channels) * 14;
+ samples = b->last_block_samples;
+ skip = b->last_block_size - b->last_block_used_bytes;
+
+ if (samples < size * 14 / 8) {
+ uint32_t adjusted_size = samples / 14 * 8;
+ if (samples % 14)
+ adjusted_size += (samples % 14 + 1) / 2 + 1;
+
+ skip += size - adjusted_size;
+ size = adjusted_size;
+ }
} else if (b->current_block < b->block_count) {
size = b->block_size;
samples = b->samples_per_block;
return AVERROR_EOF;
}
- if (codec->codec_id == AV_CODEC_ID_ADPCM_THP) {
+ if (codec->codec_id == AV_CODEC_ID_ADPCM_THP ||
+ codec->codec_id == AV_CODEC_ID_ADPCM_THP_LE) {
uint8_t *dst;
- if (av_new_packet(pkt, 8 + (32 + 4) * codec->channels + size) < 0)
+ if (av_new_packet(pkt, 8 + (32 + 4 + size) * codec->channels) < 0)
return AVERROR(ENOMEM);
dst = pkt->data;
- bytestream_put_be32(&dst, size);
- bytestream_put_be32(&dst, samples);
+ if (codec->codec_id == AV_CODEC_ID_ADPCM_THP_LE) {
+ bytestream_put_le32(&dst, size * codec->channels);
+ bytestream_put_le32(&dst, samples);
+ } else {
+ bytestream_put_be32(&dst, size * codec->channels);
+ bytestream_put_be32(&dst, samples);
+ }
bytestream_put_buffer(&dst, b->table, 32 * codec->channels);
bytestream_put_buffer(&dst, b->adpc + 4 * codec->channels *
(b->current_block - 1), 4 * codec->channels);
- ret = avio_read(s->pb, dst, size);
- if (ret != size)
- av_free_packet(pkt);
+ for (i = 0; i < codec->channels; i++) {
+ ret = avio_read(s->pb, dst, size);
+ dst += size;
+ avio_skip(s->pb, skip);
+ if (ret != size) {
+ av_free_packet(pkt);
+ break;
+ }
+ }
pkt->duration = samples;
} else {
+ size *= codec->channels;
ret = av_get_packet(s->pb, pkt, size);
}
return ret;
}
+static int read_seek(AVFormatContext *s, int stream_index,
+ int64_t timestamp, int flags)
+{
+ AVStream *st = s->streams[stream_index];
+ BRSTMDemuxContext *b = s->priv_data;
+ int64_t ret = 0;
+
+ timestamp /= b->samples_per_block;
+ ret = avio_seek(s->pb, b->data_start + timestamp * b->block_size *
+ st->codec->channels, SEEK_SET);
+ if (ret < 0)
+ return ret;
+
+ b->current_block = timestamp;
+ ff_update_cur_dts(s, st, timestamp * b->samples_per_block);
+ return 0;
+}
+
AVInputFormat ff_brstm_demuxer = {
.name = "brstm",
.long_name = NULL_IF_CONFIG_SMALL("BRSTM (Binary Revolution Stream)"),
.read_header = read_header,
.read_packet = read_packet,
.read_close = read_close,
+ .read_seek = read_seek,
.extensions = "brstm",
};
+
+AVInputFormat ff_bfstm_demuxer = {
+ .name = "bfstm",
+ .long_name = NULL_IF_CONFIG_SMALL("BFSTM (Binary Cafe Stream)"),
+ .priv_data_size = sizeof(BRSTMDemuxContext),
+ .read_probe = probe_bfstm,
+ .read_header = read_header,
+ .read_packet = read_packet,
+ .read_close = read_close,
+ .read_seek = read_seek,
+ .extensions = "bfstm,bcstm",
+};
projects / ffmpeg / blobdiff