* Musepack demuxer
* Copyright (c) 2006 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "libavcodec/bitstream.h"
+#include "libavutil/channel_layout.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 {
+typedef struct MPCFrame {
int64_t pos;
int size, skip;
}MPCFrame;
-typedef struct {
+typedef struct MPCContext {
int ver;
uint32_t curframe, lastframe;
uint32_t fcount;
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;
- if (d[0] == 'I' && d[1] == 'D' && d[2] == '3')
- return AVPROBE_SCORE_MAX / 2;
return 0;
}
-static int mpc_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int mpc_read_header(AVFormatContext *s)
{
MPCContext *c = s->priv_data;
AVStream *st;
- int t;
- t = get_le24(s->pb);
- if(t != MKTAG('M', 'P', '+', 0)){
- if(t != MKTAG('I', 'D', '3', 0)){
- av_log(s, AV_LOG_ERROR, "Not a Musepack file\n");
- return -1;
- }
- /* skip ID3 tags and try again */
- url_fskip(s->pb, 3);
- t = get_byte(s->pb) << 21;
- t |= get_byte(s->pb) << 14;
- t |= get_byte(s->pb) << 7;
- t |= get_byte(s->pb);
- av_log(s, AV_LOG_DEBUG, "Skipping %d(%X) bytes of ID3 data\n", t, t);
- url_fskip(s->pb, t);
- if(get_le24(s->pb) != MKTAG('M', 'P', '+', 0)){
- av_log(s, AV_LOG_ERROR, "Not a Musepack file\n");
- return -1;
- }
+ 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 = get_byte(s->pb);
+ 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 -1;
+ return AVERROR_INVALIDDATA;
}
- c->fcount = get_le32(s->pb);
+ 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 -1;
+ 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->frames = av_malloc(c->fcount * sizeof(MPCFrame));
c->curframe = 0;
c->lastframe = -1;
c->curbits = 8;
c->frames_noted = 0;
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
- st->codec->codec_type = CODEC_TYPE_AUDIO;
- st->codec->codec_id = CODEC_ID_MUSEPACK7;
- st->codec->channels = 2;
- st->codec->bits_per_sample = 16;
-
- st->codec->extradata_size = 16;
- st->codec->extradata = av_mallocz(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE);
- get_buffer(s->pb, st->codec->extradata, 16);
- st->codec->sample_rate = mpc_rate[st->codec->extradata[2] & 3];
- av_set_pts_info(st, 32, MPC_FRAMESIZE, st->codec->sample_rate);
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codecpar->codec_id = AV_CODEC_ID_MUSEPACK7;
+ st->codecpar->channels = 2;
+ st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
+ st->codecpar->bits_per_coded_sample = 16;
+
+ st->codecpar->extradata_size = 16;
+ st->codecpar->extradata = av_mallocz(st->codecpar->extradata_size+AV_INPUT_BUFFER_PADDING_SIZE);
+ avio_read(s->pb, st->codecpar->extradata, 16);
+ st->codecpar->sample_rate = mpc_rate[st->codecpar->extradata[2] & 3];
+ avpriv_set_pts_info(st, 32, MPC_FRAMESIZE, st->codecpar->sample_rate);
/* scan for seekpoints */
- s->start_time = 0;
- s->duration = (int64_t)c->fcount * MPC_FRAMESIZE * AV_TIME_BASE / st->codec->sample_rate;
+ st->start_time = 0;
+ st->duration = c->fcount;
+
+ /* try to read APE tags */
+ if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
+ 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;
}
{
MPCContext *c = s->priv_data;
int ret, size, size2, curbits, cur = c->curframe;
- int64_t tmp, pos;
+ unsigned tmp;
+ int64_t pos;
- if (c->curframe >= c->fcount)
- return -1;
+ if (c->curframe >= c->fcount && c->fcount)
+ return AVERROR_EOF;
if(c->curframe != c->lastframe + 1){
- url_fseek(s->pb, c->frames[c->curframe].pos, SEEK_SET);
+ 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 = url_ftell(s->pb);
- tmp = get_le32(s->pb);
+ pos = avio_tell(s->pb);
+ tmp = avio_rl32(s->pb);
if(curbits <= 12){
size2 = (tmp >> (12 - curbits)) & 0xFFFFF;
}else{
- tmp = (tmp << 32) | get_le32(s->pb);
- size2 = (tmp >> (44 - curbits)) & 0xFFFFF;
+ size2 = (tmp << (curbits - 12) | avio_rl32(s->pb) >> (44 - curbits)) & 0xFFFFF;
}
curbits += 20;
- url_fseek(s->pb, pos, SEEK_SET);
+ avio_seek(s->pb, pos, SEEK_SET);
size = ((size2 + curbits + 31) & ~31) >> 3;
- if(cur == c->frames_noted){
+ if(cur == c->frames_noted && c->fcount){
c->frames[cur].pos = pos;
c->frames[cur].size = size;
c->frames[cur].skip = curbits - 20;
}
c->curbits = (curbits + size2) & 0x1F;
- if (av_new_packet(pkt, size) < 0)
- return AVERROR(EIO);
+ if ((ret = av_new_packet(pkt, size)) < 0)
+ return ret;
pkt->data[0] = curbits;
- pkt->data[1] = (c->curframe > c->fcount);
+ 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 = get_buffer(s->pb, pkt->data + 4, size);
+ ret = avio_read(s->pb, pkt->data + 4, size);
if(c->curbits)
- url_fseek(s->pb, -4, SEEK_CUR);
+ avio_seek(s->pb, -4, SEEK_CUR);
if(ret < size){
- av_free_packet(pkt);
- return AVERROR(EIO);
+ av_packet_unref(pkt);
+ return ret < 0 ? ret : AVERROR(EIO);
}
pkt->size = ret + 4;
ret = av_read_frame(s, pkt);
if (ret < 0){
c->curframe = lastframe;
- return -1;
+ return ret;
}
- av_free_packet(pkt);
+ av_packet_unref(pkt);
}
return 0;
}
-AVInputFormat mpc_demuxer = {
- "mpc",
- NULL_IF_CONFIG_SMALL("Musepack"),
- sizeof(MPCContext),
- mpc_probe,
- mpc_read_header,
- mpc_read_packet,
- mpc_read_close,
- mpc_read_seek,
- .extensions = "mpc",
+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",
};
projects / ffmpeg / blobdiff