Updated FFMPEG to version 1.1.2, using this project: http://sourceforge.net/projects/ffmpeg4android/

project/jni/ffmpeg/libavformat/tta.c

@@ -0,0 +1,171 @@
+/*
+ * TTA demuxer
+ * Copyright (c) 2006 Alex Beregszaszi
+ *
+ * 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 "libavcodec/get_bits.h"
+#include "avformat.h"
+#include "internal.h"
+#include "id3v1.h"
+#include "libavutil/dict.h"
+
+typedef struct {
+    int totalframes, currentframe;
+    int frame_size;
+    int last_frame_size;
+} TTAContext;
+
+static int tta_probe(AVProbeData *p)
+{
+    const uint8_t *d = p->buf;
+
+    if (d[0] == 'T' && d[1] == 'T' && d[2] == 'A' && d[3] == '1')
+        return 80;
+    return 0;
+}
+
+static int tta_read_header(AVFormatContext *s)
+{
+    TTAContext *c = s->priv_data;
+    AVStream *st;
+    int i, channels, bps, samplerate;
+    uint64_t framepos, start_offset;
+    uint32_t datalen;
+
+    if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
+        ff_id3v1_read(s);
+
+    start_offset = avio_tell(s->pb);
+    if (avio_rl32(s->pb) != AV_RL32("TTA1"))
+        return -1; // not tta file
+
+    avio_skip(s->pb, 2); // FIXME: flags
+    channels = avio_rl16(s->pb);
+    bps = avio_rl16(s->pb);
+    samplerate = avio_rl32(s->pb);
+    if(samplerate <= 0 || samplerate > 1000000){
+        av_log(s, AV_LOG_ERROR, "nonsense samplerate\n");
+        return -1;
+    }
+
+    datalen = avio_rl32(s->pb);
+    if (!datalen) {
+        av_log(s, AV_LOG_ERROR, "invalid datalen\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    avio_skip(s->pb, 4); // header crc
+
+    c->frame_size      = samplerate * 256 / 245;
+    c->last_frame_size = datalen % c->frame_size;
+    if (!c->last_frame_size)
+        c->last_frame_size = c->frame_size;
+    c->totalframes = datalen / c->frame_size + (c->last_frame_size < c->frame_size);
+    c->currentframe = 0;
+
+    if(c->totalframes >= UINT_MAX/sizeof(uint32_t) || c->totalframes <= 0){
+        av_log(s, AV_LOG_ERROR, "totalframes %d invalid\n", c->totalframes);
+        return -1;
+    }
+
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    avpriv_set_pts_info(st, 64, 1, samplerate);
+    st->start_time = 0;
+    st->duration = datalen;
+
+    framepos = avio_tell(s->pb) + 4*c->totalframes + 4;
+
+    for (i = 0; i < c->totalframes; i++) {
+        uint32_t size = avio_rl32(s->pb);
+        av_add_index_entry(st, framepos, i * c->frame_size, size, 0,
+                           AVINDEX_KEYFRAME);
+        framepos += size;
+    }
+    avio_skip(s->pb, 4); // seektable crc
+
+    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+    st->codec->codec_id = AV_CODEC_ID_TTA;
+    st->codec->channels = channels;
+    st->codec->sample_rate = samplerate;
+    st->codec->bits_per_coded_sample = bps;
+
+    st->codec->extradata_size = avio_tell(s->pb) - start_offset;
+    if(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
+        //this check is redundant as avio_read should fail
+        av_log(s, AV_LOG_ERROR, "extradata_size too large\n");
+        return -1;
+    }
+    st->codec->extradata = av_mallocz(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!st->codec->extradata) {
+        st->codec->extradata_size = 0;
+        return AVERROR(ENOMEM);
+    }
+    avio_seek(s->pb, start_offset, SEEK_SET);
+    avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
+
+    return 0;
+}
+
+static int tta_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    TTAContext *c = s->priv_data;
+    AVStream *st = s->streams[0];
+    int size, ret;
+
+    // FIXME!
+    if (c->currentframe >= c->totalframes)
+        return AVERROR_EOF;
+
+    size = st->index_entries[c->currentframe].size;
+
+    ret = av_get_packet(s->pb, pkt, size);
+    pkt->dts = st->index_entries[c->currentframe++].timestamp;
+    pkt->duration = c->currentframe == c->totalframes ? c->last_frame_size :
+                                                        c->frame_size;
+    return ret;
+}
+
+static int tta_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
+{
+    TTAContext *c = s->priv_data;
+    AVStream *st = s->streams[stream_index];
+    int index = av_index_search_timestamp(st, timestamp, flags);
+    if (index < 0)
+        return -1;
+    if (avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET) < 0)
+        return -1;
+
+    c->currentframe = index;
+
+    return 0;
+}
+
+AVInputFormat ff_tta_demuxer = {
+    .name           = "tta",
+    .long_name      = NULL_IF_CONFIG_SMALL("TTA (True Audio)"),
+    .priv_data_size = sizeof(TTAContext),
+    .read_probe     = tta_probe,
+    .read_header    = tta_read_header,
+    .read_packet    = tta_read_packet,
+    .read_seek      = tta_read_seek,
+    .extensions     = "tta",
+};