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Diffstat (limited to 'ffmpeg/libavformat/act.c')
-rw-r--r--ffmpeg/libavformat/act.c207
1 files changed, 0 insertions, 207 deletions
diff --git a/ffmpeg/libavformat/act.c b/ffmpeg/libavformat/act.c
deleted file mode 100644
index 3f223d5..0000000
--- a/ffmpeg/libavformat/act.c
+++ /dev/null
@@ -1,207 +0,0 @@
-/*
- * ACT file format demuxer
- * Copyright (c) 2007-2008 Vladimir Voroshilov
- *
- * 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 "riff.h"
-#include "internal.h"
-#include "libavcodec/get_bits.h"
-
-#define CHUNK_SIZE 512
-#define RIFF_TAG MKTAG('R','I','F','F')
-#define WAVE_TAG MKTAG('W','A','V','E')
-
-typedef struct{
- int bytes_left_in_chunk;
- uint8_t audio_buffer[22];///< temporary buffer for ACT frame
- char second_packet; ///< 1 - if temporary buffer contains valid (second) G.729 packet
-} ACTContext;
-
-static int probe(AVProbeData *p)
-{
- int i;
-
- if ((AV_RL32(&p->buf[0]) != RIFF_TAG) ||
- (AV_RL32(&p->buf[8]) != WAVE_TAG) ||
- (AV_RL32(&p->buf[16]) != 16))
- return 0;
-
- //We can't be sure that this is ACT and not regular WAV
- if (p->buf_size<512)
- return 0;
-
- for(i=44; i<256; i++)
- if(p->buf[i])
- return 0;
-
- if(p->buf[256]!=0x84)
- return 0;
-
- for(i=264; i<512; i++)
- if(p->buf[i])
- return 0;
-
- return AVPROBE_SCORE_MAX;
-}
-
-static int read_header(AVFormatContext *s)
-{
- ACTContext* ctx = s->priv_data;
- AVIOContext *pb = s->pb;
- int size;
- AVStream* st;
-
- int min,sec,msec;
-
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
-
- avio_skip(pb, 16);
- size=avio_rl32(pb);
- ff_get_wav_header(pb, st->codec, size);
-
- /*
- 8000Hz (Fine-rec) file format has 10 bytes long
- packets with 10ms of sound data in them
- */
- if (st->codec->sample_rate != 8000) {
- av_log(s, AV_LOG_ERROR, "Sample rate %d is not supported.\n", st->codec->sample_rate);
- return AVERROR_INVALIDDATA;
- }
-
- st->codec->frame_size=80;
- st->codec->channels=1;
- avpriv_set_pts_info(st, 64, 1, 100);
-
- st->codec->codec_id=AV_CODEC_ID_G729;
-
- avio_seek(pb, 257, SEEK_SET);
- msec=avio_rl16(pb);
- sec=avio_r8(pb);
- min=avio_rl32(pb);
-
- st->duration = av_rescale(1000*(min*60+sec)+msec, st->codec->sample_rate, 1000 * st->codec->frame_size);
-
- ctx->bytes_left_in_chunk=CHUNK_SIZE;
-
- avio_seek(pb, 512, SEEK_SET);
-
- return 0;
-}
-
-
-static int read_packet(AVFormatContext *s,
- AVPacket *pkt)
-{
- ACTContext *ctx = s->priv_data;
- AVIOContext *pb = s->pb;
- int ret;
- int frame_size=s->streams[0]->codec->sample_rate==8000?10:22;
-
-
- if(s->streams[0]->codec->sample_rate==8000)
- ret=av_new_packet(pkt, 10);
- else
- ret=av_new_packet(pkt, 11);
-
- if(ret)
- return ret;
-
- if(s->streams[0]->codec->sample_rate==4400 && !ctx->second_packet)
- {
- ret = avio_read(pb, ctx->audio_buffer, frame_size);
-
- if(ret<0)
- return ret;
- if(ret!=frame_size)
- return AVERROR(EIO);
-
- pkt->data[0]=ctx->audio_buffer[11];
- pkt->data[1]=ctx->audio_buffer[0];
- pkt->data[2]=ctx->audio_buffer[12];
- pkt->data[3]=ctx->audio_buffer[1];
- pkt->data[4]=ctx->audio_buffer[13];
- pkt->data[5]=ctx->audio_buffer[2];
- pkt->data[6]=ctx->audio_buffer[14];
- pkt->data[7]=ctx->audio_buffer[3];
- pkt->data[8]=ctx->audio_buffer[15];
- pkt->data[9]=ctx->audio_buffer[4];
- pkt->data[10]=ctx->audio_buffer[16];
-
- ctx->second_packet=1;
- }
- else if(s->streams[0]->codec->sample_rate==4400 && ctx->second_packet)
- {
- pkt->data[0]=ctx->audio_buffer[5];
- pkt->data[1]=ctx->audio_buffer[17];
- pkt->data[2]=ctx->audio_buffer[6];
- pkt->data[3]=ctx->audio_buffer[18];
- pkt->data[4]=ctx->audio_buffer[7];
- pkt->data[5]=ctx->audio_buffer[19];
- pkt->data[6]=ctx->audio_buffer[8];
- pkt->data[7]=ctx->audio_buffer[20];
- pkt->data[8]=ctx->audio_buffer[9];
- pkt->data[9]=ctx->audio_buffer[21];
- pkt->data[10]=ctx->audio_buffer[10];
-
- ctx->second_packet=0;
- }
- else // 8000 Hz
- {
- ret = avio_read(pb, ctx->audio_buffer, frame_size);
-
- if(ret<0)
- return ret;
- if(ret!=frame_size)
- return AVERROR(EIO);
-
- pkt->data[0]=ctx->audio_buffer[5];
- pkt->data[1]=ctx->audio_buffer[0];
- pkt->data[2]=ctx->audio_buffer[6];
- pkt->data[3]=ctx->audio_buffer[1];
- pkt->data[4]=ctx->audio_buffer[7];
- pkt->data[5]=ctx->audio_buffer[2];
- pkt->data[6]=ctx->audio_buffer[8];
- pkt->data[7]=ctx->audio_buffer[3];
- pkt->data[8]=ctx->audio_buffer[9];
- pkt->data[9]=ctx->audio_buffer[4];
- }
-
- ctx->bytes_left_in_chunk -= frame_size;
-
- if(ctx->bytes_left_in_chunk < frame_size)
- {
- avio_skip(pb, ctx->bytes_left_in_chunk);
- ctx->bytes_left_in_chunk=CHUNK_SIZE;
- }
-
- pkt->duration=1;
-
- return ret;
-}
-
-AVInputFormat ff_act_demuxer = {
- .name = "act",
- .long_name = "ACT Voice file format",
- .priv_data_size = sizeof(ACTContext),
- .read_probe = probe,
- .read_header = read_header,
- .read_packet = read_packet,
-};
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