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Diffstat (limited to 'contrib/ffmpeg/libavformat/mpc8.c')
-rw-r--r--contrib/ffmpeg/libavformat/mpc8.c244
1 files changed, 0 insertions, 244 deletions
diff --git a/contrib/ffmpeg/libavformat/mpc8.c b/contrib/ffmpeg/libavformat/mpc8.c
deleted file mode 100644
index 879c7d236..000000000
--- a/contrib/ffmpeg/libavformat/mpc8.c
+++ /dev/null
@@ -1,244 +0,0 @@
-/*
- * Musepack SV8 demuxer
- * Copyright (c) 2007 Konstantin Shishkov
- *
- * 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 2.1 of the License, or (at your option) any later version.
- *
- * 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 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 "unary.h"
-
-/// Two-byte MPC tag
-#define MKMPCTAG(a, b) (a | (b << 8))
-
-#define TAG_MPCK MKTAG('M','P','C','K')
-
-/// Reserved MPC tags
-enum MPCPacketTags{
- TAG_STREAMHDR = MKMPCTAG('S','H'),
- TAG_STREAMEND = MKMPCTAG('S','E'),
-
- TAG_AUDIOPACKET = MKMPCTAG('A','P'),
-
- TAG_SEEKTBLOFF = MKMPCTAG('S','O'),
- TAG_SEEKTABLE = MKMPCTAG('S','T'),
-
- TAG_REPLAYGAIN = MKMPCTAG('R','G'),
- TAG_ENCINFO = MKMPCTAG('E','I'),
-};
-
-static const int mpc8_rate[8] = { 44100, 48000, 37800, 32000, -1, -1, -1, -1 };
-
-typedef struct {
- int ver;
- int frame;
- int64_t header_pos;
- int64_t samples;
-} MPCContext;
-
-static int mpc8_probe(AVProbeData *p)
-{
- if (AV_RL32(p->buf) == TAG_MPCK)
- return AVPROBE_SCORE_MAX;
- return 0;
-}
-
-static inline int64_t gb_get_v(GetBitContext *gb)
-{
- int64_t v = 0;
- int bits = 0;
- while(get_bits1(gb) && bits < 64-7){
- v <<= 7;
- v |= get_bits(gb, 7);
- bits += 7;
- }
- v <<= 7;
- v |= get_bits(gb, 7);
-
- return v;
-}
-
-static void mpc8_get_chunk_header(ByteIOContext *pb, int *tag, int64_t *size)
-{
- int64_t pos;
- pos = url_ftell(pb);
- *tag = get_le16(pb);
- *size = ff_get_v(pb);
- *size -= url_ftell(pb) - pos;
-}
-
-static void mpc8_parse_seektable(AVFormatContext *s, int64_t off)
-{
- MPCContext *c = s->priv_data;
- int tag;
- int64_t size, pos, ppos[2];
- uint8_t *buf;
- int i, t, seekd;
- GetBitContext gb;
-
- url_fseek(s->pb, off, SEEK_SET);
- mpc8_get_chunk_header(s->pb, &tag, &size);
- if(tag != TAG_SEEKTABLE){
- av_log(s, AV_LOG_ERROR, "No seek table at given position\n");
- return;
- }
- if(!(buf = av_malloc(size)))
- return;
- get_buffer(s->pb, buf, size);
- init_get_bits(&gb, buf, size * 8);
- size = gb_get_v(&gb);
- if(size > UINT_MAX/4 || size > c->samples/1152){
- av_log(s, AV_LOG_ERROR, "Seek table is too big\n");
- return;
- }
- seekd = get_bits(&gb, 4);
- for(i = 0; i < 2; i++){
- pos = gb_get_v(&gb) + c->header_pos;
- ppos[1 - i] = pos;
- av_add_index_entry(s->streams[0], pos, i, 0, 0, AVINDEX_KEYFRAME);
- }
- for(; i < size; i++){
- t = get_unary(&gb, 1, 33) << 12;
- t += get_bits(&gb, 12);
- if(t & 1)
- t = -(t & ~1);
- pos = (t >> 1) + ppos[0]*2 - ppos[1];
- av_add_index_entry(s->streams[0], pos, i << seekd, 0, 0, AVINDEX_KEYFRAME);
- ppos[1] = ppos[0];
- ppos[0] = pos;
- }
- av_free(buf);
-}
-
-static void mpc8_handle_chunk(AVFormatContext *s, int tag, int64_t chunk_pos, int64_t size)
-{
- ByteIOContext *pb = s->pb;
- int64_t pos, off;
-
- switch(tag){
- case TAG_SEEKTBLOFF:
- pos = url_ftell(pb) + size;
- off = ff_get_v(pb);
- mpc8_parse_seektable(s, chunk_pos + off);
- url_fseek(pb, pos, SEEK_SET);
- break;
- default:
- url_fskip(pb, size);
- }
-}
-
-static int mpc8_read_header(AVFormatContext *s, AVFormatParameters *ap)
-{
- MPCContext *c = s->priv_data;
- ByteIOContext *pb = s->pb;
- AVStream *st;
- int tag = 0;
- int64_t size, pos;
-
- c->header_pos = url_ftell(pb);
- if(get_le32(pb) != TAG_MPCK){
- av_log(s, AV_LOG_ERROR, "Not a Musepack8 file\n");
- return -1;
- }
-
- while(!url_feof(pb)){
- pos = url_ftell(pb);
- mpc8_get_chunk_header(pb, &tag, &size);
- if(tag == TAG_STREAMHDR)
- break;
- mpc8_handle_chunk(s, tag, pos, size);
- }
- if(tag != TAG_STREAMHDR){
- av_log(s, AV_LOG_ERROR, "Stream header not found\n");
- return -1;
- }
- pos = url_ftell(pb);
- url_fskip(pb, 4); //CRC
- c->ver = get_byte(pb);
- if(c->ver != 8){
- av_log(s, AV_LOG_ERROR, "Unknown stream version %d\n", c->ver);
- return -1;
- }
- c->samples = ff_get_v(pb);
- ff_get_v(pb); //silence samples at the beginning
-
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR(ENOMEM);
- st->codec->codec_type = CODEC_TYPE_AUDIO;
- st->codec->codec_id = CODEC_ID_MUSEPACK8;
- st->codec->bits_per_sample = 16;
-
- st->codec->extradata_size = 2;
- st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
- get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
-
- st->codec->channels = (st->codec->extradata[1] >> 4) + 1;
- st->codec->sample_rate = mpc8_rate[st->codec->extradata[0] >> 5];
- av_set_pts_info(st, 32, 1152 << (st->codec->extradata[1]&3)*2, st->codec->sample_rate);
- st->duration = c->samples / (1152 << (st->codec->extradata[1]&3)*2);
- size -= url_ftell(pb) - pos;
-
- return 0;
-}
-
-static int mpc8_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- MPCContext *c = s->priv_data;
- int tag;
- int64_t pos, size;
-
- while(!url_feof(s->pb)){
- pos = url_ftell(s->pb);
- mpc8_get_chunk_header(s->pb, &tag, &size);
- if(tag == TAG_AUDIOPACKET){
- if(av_get_packet(s->pb, pkt, size) < 0)
- return AVERROR(ENOMEM);
- pkt->stream_index = 0;
- pkt->pts = c->frame;
- return 0;
- }
- if(tag == TAG_STREAMEND)
- return AVERROR(EIO);
- mpc8_handle_chunk(s, tag, pos, size);
- }
- return 0;
-}
-
-static int mpc8_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
-{
- AVStream *st = s->streams[stream_index];
- MPCContext *c = s->priv_data;
- int index = av_index_search_timestamp(st, timestamp, flags);
-
- if(index < 0) return -1;
- url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET);
- c->frame = st->index_entries[index].timestamp;
- return 0;
-}
-
-
-AVInputFormat mpc8_demuxer = {
- "mpc8",
- "musepack8",
- sizeof(MPCContext),
- mpc8_probe,
- mpc8_read_header,
- mpc8_read_packet,
- NULL,
- mpc8_read_seek,
-};
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