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Diffstat (limited to 'ffmpeg1/libavformat/mpc.c')
-rw-r--r--ffmpeg1/libavformat/mpc.c237
1 files changed, 0 insertions, 237 deletions
diff --git a/ffmpeg1/libavformat/mpc.c b/ffmpeg1/libavformat/mpc.c
deleted file mode 100644
index b0f6f53..0000000
--- a/ffmpeg1/libavformat/mpc.c
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- * Musepack demuxer
- * Copyright (c) 2006 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 "libavutil/channel_layout.h"
-#include "libavcodec/get_bits.h"
-#include "avformat.h"
-#include "internal.h"
-#include "apetag.h"
-#include "id3v1.h"
-#include "libavutil/dict.h"
-
-#define MPC_FRAMESIZE 1152
-#define DELAY_FRAMES 32
-
-static const int mpc_rate[4] = { 44100, 48000, 37800, 32000 };
-typedef struct {
- int64_t pos;
- int size, skip;
-}MPCFrame;
-
-typedef struct {
- int ver;
- uint32_t curframe, lastframe;
- uint32_t fcount;
- MPCFrame *frames;
- int curbits;
- int frames_noted;
-} MPCContext;
-
-static int mpc_probe(AVProbeData *p)
-{
- const uint8_t *d = p->buf;
- if (d[0] == 'M' && d[1] == 'P' && d[2] == '+' && (d[3] == 0x17 || d[3] == 0x7))
- return AVPROBE_SCORE_MAX;
- return 0;
-}
-
-static int mpc_read_header(AVFormatContext *s)
-{
- MPCContext *c = s->priv_data;
- AVStream *st;
-
- if(avio_rl24(s->pb) != MKTAG('M', 'P', '+', 0)){
- av_log(s, AV_LOG_ERROR, "Not a Musepack file\n");
- return AVERROR_INVALIDDATA;
- }
- c->ver = avio_r8(s->pb);
- if(c->ver != 0x07 && c->ver != 0x17){
- av_log(s, AV_LOG_ERROR, "Can demux Musepack SV7, got version %02X\n", c->ver);
- return AVERROR_INVALIDDATA;
- }
- c->fcount = avio_rl32(s->pb);
- if((int64_t)c->fcount * sizeof(MPCFrame) >= UINT_MAX){
- av_log(s, AV_LOG_ERROR, "Too many frames, seeking is not possible\n");
- return AVERROR_INVALIDDATA;
- }
- if(c->fcount){
- c->frames = av_malloc(c->fcount * sizeof(MPCFrame));
- if(!c->frames){
- av_log(s, AV_LOG_ERROR, "Cannot allocate seektable\n");
- return AVERROR(ENOMEM);
- }
- }else{
- av_log(s, AV_LOG_WARNING, "Container reports no frames\n");
- }
- c->curframe = 0;
- c->lastframe = -1;
- c->curbits = 8;
- c->frames_noted = 0;
-
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_id = AV_CODEC_ID_MUSEPACK7;
- st->codec->channels = 2;
- st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
- st->codec->bits_per_coded_sample = 16;
-
- st->codec->extradata_size = 16;
- st->codec->extradata = av_mallocz(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE);
- avio_read(s->pb, st->codec->extradata, 16);
- st->codec->sample_rate = mpc_rate[st->codec->extradata[2] & 3];
- avpriv_set_pts_info(st, 32, MPC_FRAMESIZE, st->codec->sample_rate);
- /* scan for seekpoints */
- st->start_time = 0;
- st->duration = c->fcount;
-
- /* try to read APE tags */
- if (s->pb->seekable) {
- int64_t pos = avio_tell(s->pb);
- ff_ape_parse_tag(s);
- if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
- ff_id3v1_read(s);
- avio_seek(s->pb, pos, SEEK_SET);
- }
-
- return 0;
-}
-
-static int mpc_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- MPCContext *c = s->priv_data;
- int ret, size, size2, curbits, cur = c->curframe;
- unsigned tmp;
- int64_t pos;
-
- if (c->curframe >= c->fcount && c->fcount)
- return AVERROR_EOF;
-
- if(c->curframe != c->lastframe + 1){
- avio_seek(s->pb, c->frames[c->curframe].pos, SEEK_SET);
- c->curbits = c->frames[c->curframe].skip;
- }
- c->lastframe = c->curframe;
- c->curframe++;
- curbits = c->curbits;
- pos = avio_tell(s->pb);
- tmp = avio_rl32(s->pb);
- if(curbits <= 12){
- size2 = (tmp >> (12 - curbits)) & 0xFFFFF;
- }else{
- size2 = (tmp << (curbits - 12) | avio_rl32(s->pb) >> (44 - curbits)) & 0xFFFFF;
- }
- curbits += 20;
- avio_seek(s->pb, pos, SEEK_SET);
-
- size = ((size2 + curbits + 31) & ~31) >> 3;
- if(cur == c->frames_noted && c->fcount){
- c->frames[cur].pos = pos;
- c->frames[cur].size = size;
- c->frames[cur].skip = curbits - 20;
- av_add_index_entry(s->streams[0], cur, cur, size, 0, AVINDEX_KEYFRAME);
- c->frames_noted++;
- }
- c->curbits = (curbits + size2) & 0x1F;
-
- if ((ret = av_new_packet(pkt, size)) < 0)
- return ret;
-
- pkt->data[0] = curbits;
- pkt->data[1] = (c->curframe > c->fcount) && c->fcount;
- pkt->data[2] = 0;
- pkt->data[3] = 0;
-
- pkt->stream_index = 0;
- pkt->pts = cur;
- ret = avio_read(s->pb, pkt->data + 4, size);
- if(c->curbits)
- avio_seek(s->pb, -4, SEEK_CUR);
- if(ret < size){
- av_free_packet(pkt);
- return ret < 0 ? ret : AVERROR(EIO);
- }
- pkt->size = ret + 4;
-
- return 0;
-}
-
-static int mpc_read_close(AVFormatContext *s)
-{
- MPCContext *c = s->priv_data;
-
- av_freep(&c->frames);
- return 0;
-}
-
-/**
- * Seek to the given position
- * If position is unknown but is within the limits of file
- * then packets are skipped unless desired position is reached
- *
- * Also this function makes use of the fact that timestamp == frameno
- */
-static int mpc_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
-{
- AVStream *st = s->streams[stream_index];
- MPCContext *c = s->priv_data;
- AVPacket pkt1, *pkt = &pkt1;
- int ret;
- int index = av_index_search_timestamp(st, FFMAX(timestamp - DELAY_FRAMES, 0), flags);
- uint32_t lastframe;
-
- /* if found, seek there */
- if (index >= 0 && st->index_entries[st->nb_index_entries-1].timestamp >= timestamp - DELAY_FRAMES){
- c->curframe = st->index_entries[index].pos;
- return 0;
- }
- /* if timestamp is out of bounds, return error */
- if(timestamp < 0 || timestamp >= c->fcount)
- return -1;
- timestamp -= DELAY_FRAMES;
- /* seek to the furthest known position and read packets until
- we reach desired position */
- lastframe = c->curframe;
- if(c->frames_noted) c->curframe = c->frames_noted - 1;
- while(c->curframe < timestamp){
- ret = av_read_frame(s, pkt);
- if (ret < 0){
- c->curframe = lastframe;
- return ret;
- }
- av_free_packet(pkt);
- }
- return 0;
-}
-
-
-AVInputFormat ff_mpc_demuxer = {
- .name = "mpc",
- .long_name = NULL_IF_CONFIG_SMALL("Musepack"),
- .priv_data_size = sizeof(MPCContext),
- .read_probe = mpc_probe,
- .read_header = mpc_read_header,
- .read_packet = mpc_read_packet,
- .read_close = mpc_read_close,
- .read_seek = mpc_read_seek,
- .extensions = "mpc",
-};
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