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Diffstat (limited to 'contrib/ffmpeg/libavformat/mmf.c')
-rw-r--r--contrib/ffmpeg/libavformat/mmf.c331
1 files changed, 0 insertions, 331 deletions
diff --git a/contrib/ffmpeg/libavformat/mmf.c b/contrib/ffmpeg/libavformat/mmf.c
deleted file mode 100644
index 40b1a497c..000000000
--- a/contrib/ffmpeg/libavformat/mmf.c
+++ /dev/null
@@ -1,331 +0,0 @@
-/*
- * Yamaha SMAF format
- * Copyright (c) 2005 Vidar Madsen
- *
- * 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 "allformats.h"
-#include "riff.h"
-
-typedef struct {
- offset_t atrpos, atsqpos, awapos;
- offset_t data_size;
-} MMFContext;
-
-static int mmf_rates[] = { 4000, 8000, 11025, 22050, 44100 };
-
-static int mmf_rate_code(int rate)
-{
- int i;
- for(i = 0; i < 5; i++)
- if(mmf_rates[i] == rate)
- return i;
- return -1;
-}
-
-static int mmf_rate(int code)
-{
- if((code < 0) || (code > 4))
- return -1;
- return mmf_rates[code];
-}
-
-#ifdef CONFIG_MUXERS
-/* Copy of end_tag() from avienc.c, but for big-endian chunk size */
-static void end_tag_be(ByteIOContext *pb, offset_t start)
-{
- offset_t pos;
-
- pos = url_ftell(pb);
- url_fseek(pb, start - 4, SEEK_SET);
- put_be32(pb, (uint32_t)(pos - start));
- url_fseek(pb, pos, SEEK_SET);
-}
-
-static int mmf_write_header(AVFormatContext *s)
-{
- MMFContext *mmf = s->priv_data;
- ByteIOContext *pb = &s->pb;
- offset_t pos;
- int rate;
-
- rate = mmf_rate_code(s->streams[0]->codec->sample_rate);
- if(rate < 0) {
- av_log(s, AV_LOG_ERROR, "Unsupported sample rate %d\n", s->streams[0]->codec->sample_rate);
- return -1;
- }
-
- put_tag(pb, "MMMD");
- put_be32(pb, 0);
- pos = start_tag(pb, "CNTI");
- put_byte(pb, 0); /* class */
- put_byte(pb, 0); /* type */
- put_byte(pb, 0); /* code type */
- put_byte(pb, 0); /* status */
- put_byte(pb, 0); /* counts */
- put_tag(pb, "VN:libavcodec,"); /* metadata ("ST:songtitle,VN:version,...") */
- end_tag_be(pb, pos);
-
- put_buffer(pb, "ATR\x00", 4);
- put_be32(pb, 0);
- mmf->atrpos = url_ftell(pb);
- put_byte(pb, 0); /* format type */
- put_byte(pb, 0); /* sequence type */
- put_byte(pb, (0 << 7) | (1 << 4) | rate); /* (channel << 7) | (format << 4) | rate */
- put_byte(pb, 0); /* wave base bit */
- put_byte(pb, 2); /* time base d */
- put_byte(pb, 2); /* time base g */
-
- put_tag(pb, "Atsq");
- put_be32(pb, 16);
- mmf->atsqpos = url_ftell(pb);
- /* Will be filled on close */
- put_buffer(pb, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16);
-
- mmf->awapos = start_tag(pb, "Awa\x01");
-
- av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
-
- put_flush_packet(pb);
-
- return 0;
-}
-
-static int mmf_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
- ByteIOContext *pb = &s->pb;
- put_buffer(pb, pkt->data, pkt->size);
- return 0;
-}
-
-/* Write a variable-length symbol */
-static void put_varlength(ByteIOContext *pb, int val)
-{
- if(val < 128)
- put_byte(pb, val);
- else {
- val -= 128;
- put_byte(pb, 0x80 | val >> 7);
- put_byte(pb, 0x7f & val);
- }
-}
-
-static int mmf_write_trailer(AVFormatContext *s)
-{
- ByteIOContext *pb = &s->pb;
- MMFContext *mmf = s->priv_data;
- offset_t pos, size;
- int gatetime;
-
- if (!url_is_streamed(&s->pb)) {
- /* Fill in length fields */
- end_tag_be(pb, mmf->awapos);
- end_tag_be(pb, mmf->atrpos);
- end_tag_be(pb, 8);
-
- pos = url_ftell(pb);
- size = pos - mmf->awapos;
-
- /* Fill Atsq chunk */
- url_fseek(pb, mmf->atsqpos, SEEK_SET);
-
- /* "play wav" */
- put_byte(pb, 0); /* start time */
- put_byte(pb, 1); /* (channel << 6) | wavenum */
- gatetime = size * 500 / s->streams[0]->codec->sample_rate;
- put_varlength(pb, gatetime); /* duration */
-
- /* "nop" */
- put_varlength(pb, gatetime); /* start time */
- put_buffer(pb, "\xff\x00", 2); /* nop */
-
- /* "end of sequence" */
- put_buffer(pb, "\x00\x00\x00\x00", 4);
-
- url_fseek(pb, pos, SEEK_SET);
-
- put_flush_packet(pb);
- }
- return 0;
-}
-#endif //CONFIG_MUXERS
-
-static int mmf_probe(AVProbeData *p)
-{
- /* check file header */
- if (p->buf_size <= 32)
- return 0;
- if (p->buf[0] == 'M' && p->buf[1] == 'M' &&
- p->buf[2] == 'M' && p->buf[3] == 'D' &&
- p->buf[8] == 'C' && p->buf[9] == 'N' &&
- p->buf[10] == 'T' && p->buf[11] == 'I')
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-/* mmf input */
-static int mmf_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
-{
- MMFContext *mmf = s->priv_data;
- unsigned int tag;
- ByteIOContext *pb = &s->pb;
- AVStream *st;
- offset_t file_size, size;
- int rate, params;
-
- tag = get_le32(pb);
- if (tag != MKTAG('M', 'M', 'M', 'D'))
- return -1;
- file_size = get_be32(pb);
-
- /* Skip some unused chunks that may or may not be present */
- for(;; url_fseek(pb, size, SEEK_CUR)) {
- tag = get_le32(pb);
- size = get_be32(pb);
- if(tag == MKTAG('C','N','T','I')) continue;
- if(tag == MKTAG('O','P','D','A')) continue;
- break;
- }
-
- /* Tag = "ATRx", where "x" = track number */
- if ((tag & 0xffffff) == MKTAG('M', 'T', 'R', 0)) {
- av_log(s, AV_LOG_ERROR, "MIDI like format found, unsupported\n");
- return -1;
- }
- if ((tag & 0xffffff) != MKTAG('A', 'T', 'R', 0)) {
- av_log(s, AV_LOG_ERROR, "Unsupported SMAF chunk %08x\n", tag);
- return -1;
- }
-
- get_byte(pb); /* format type */
- get_byte(pb); /* sequence type */
- params = get_byte(pb); /* (channel << 7) | (format << 4) | rate */
- rate = mmf_rate(params & 0x0f);
- if(rate < 0) {
- av_log(s, AV_LOG_ERROR, "Invalid sample rate\n");
- return -1;
- }
- get_byte(pb); /* wave base bit */
- get_byte(pb); /* time base d */
- get_byte(pb); /* time base g */
-
- /* Skip some unused chunks that may or may not be present */
- for(;; url_fseek(pb, size, SEEK_CUR)) {
- tag = get_le32(pb);
- size = get_be32(pb);
- if(tag == MKTAG('A','t','s','q')) continue;
- if(tag == MKTAG('A','s','p','I')) continue;
- break;
- }
-
- /* Make sure it's followed by an Awa chunk, aka wave data */
- if ((tag & 0xffffff) != MKTAG('A', 'w', 'a', 0)) {
- av_log(s, AV_LOG_ERROR, "Unexpected SMAF chunk %08x\n", tag);
- return -1;
- }
- mmf->data_size = size;
-
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR_NOMEM;
-
- st->codec->codec_type = CODEC_TYPE_AUDIO;
- st->codec->codec_id = CODEC_ID_ADPCM_YAMAHA;
- st->codec->sample_rate = rate;
- st->codec->channels = 1;
- st->codec->bits_per_sample = 4;
- st->codec->bit_rate = st->codec->sample_rate * st->codec->bits_per_sample;
-
- av_set_pts_info(st, 64, 1, st->codec->sample_rate);
-
- return 0;
-}
-
-#define MAX_SIZE 4096
-
-static int mmf_read_packet(AVFormatContext *s,
- AVPacket *pkt)
-{
- MMFContext *mmf = s->priv_data;
- AVStream *st;
- int ret, size;
-
- if (url_feof(&s->pb))
- return AVERROR_IO;
- st = s->streams[0];
-
- size = MAX_SIZE;
- if(size > mmf->data_size)
- size = mmf->data_size;
-
- if(!size)
- return AVERROR_IO;
-
- if (av_new_packet(pkt, size))
- return AVERROR_IO;
- pkt->stream_index = 0;
-
- ret = get_buffer(&s->pb, pkt->data, pkt->size);
- if (ret < 0)
- av_free_packet(pkt);
-
- mmf->data_size -= ret;
-
- pkt->size = ret;
- return ret;
-}
-
-static int mmf_read_close(AVFormatContext *s)
-{
- return 0;
-}
-
-static int mmf_read_seek(AVFormatContext *s,
- int stream_index, int64_t timestamp, int flags)
-{
- return pcm_read_seek(s, stream_index, timestamp, flags);
-}
-
-#ifdef CONFIG_MMF_DEMUXER
-AVInputFormat mmf_demuxer = {
- "mmf",
- "mmf format",
- sizeof(MMFContext),
- mmf_probe,
- mmf_read_header,
- mmf_read_packet,
- mmf_read_close,
- mmf_read_seek,
-};
-#endif
-#ifdef CONFIG_MMF_MUXER
-AVOutputFormat mmf_muxer = {
- "mmf",
- "mmf format",
- "application/vnd.smaf",
- "mmf",
- sizeof(MMFContext),
- CODEC_ID_ADPCM_YAMAHA,
- CODEC_ID_NONE,
- mmf_write_header,
- mmf_write_packet,
- mmf_write_trailer,
-};
-#endif
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