adding ffmpeg specific version

1 files changed, 319 insertions, 0 deletions

diff --git a/ffmpeg1/libavformat/mmf.c b/ffmpeg1/libavformat/mmf.c
new file mode 100644
index 0000000..d074d7c
--- /dev/null
+++ b/ffmpeg1/libavformat/mmf.c
@@ -0,0 +1,319 @@
+/*
+ * 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 "libavutil/channel_layout.h"
+#include "avformat.h"
+#include "internal.h"
+#include "avio_internal.h"
+#include "pcm.h"
+#include "rawenc.h"
+#include "riff.h"
+
+typedef struct {
+    int64_t atrpos, atsqpos, awapos;
+    int64_t data_end;
+    int stereo;
+} MMFContext;
+
+static const int mmf_rates[] = { 4000, 8000, 11025, 22050, 44100 };
+
+static int mmf_rate(int code)
+{
+    if((code < 0) || (code > 4))
+        return -1;
+    return mmf_rates[code];
+}
+
+#if CONFIG_MMF_MUXER
+static int mmf_rate_code(int rate)
+{
+    int i;
+    for(i = 0; i < 5; i++)
+        if(mmf_rates[i] == rate)
+            return i;
+    return -1;
+}
+
+/* Copy of end_tag() from avienc.c, but for big-endian chunk size */
+static void end_tag_be(AVIOContext *pb, int64_t start)
+{
+    int64_t pos;
+
+    pos = avio_tell(pb);
+    avio_seek(pb, start - 4, SEEK_SET);
+    avio_wb32(pb, (uint32_t)(pos - start));
+    avio_seek(pb, pos, SEEK_SET);
+}
+
+static int mmf_write_header(AVFormatContext *s)
+{
+    MMFContext *mmf = s->priv_data;
+    AVIOContext *pb = s->pb;
+    int64_t pos;
+    int rate;
+    const char *version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
+                          "VN:Lavf," :
+                          "VN:"LIBAVFORMAT_IDENT",";
+
+    rate = mmf_rate_code(s->streams[0]->codec->sample_rate);
+    if(rate < 0) {
+        av_log(s, AV_LOG_ERROR, "Unsupported sample rate %d, supported are 4000, 8000, 11025, 22050 and 44100\n", s->streams[0]->codec->sample_rate);
+        return AVERROR(EINVAL);
+    }
+
+    mmf->stereo = s->streams[0]->codec->channels > 1;
+    if (mmf->stereo &&
+        s->streams[0]->codec->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
+        av_log(s, AV_LOG_ERROR, "Yamaha SMAF stereo is experimental, "
+               "add '-strict %d' if you want to use it.\n",
+               FF_COMPLIANCE_EXPERIMENTAL);
+        return AVERROR(EINVAL);
+    }
+
+    ffio_wfourcc(pb, "MMMD");
+    avio_wb32(pb, 0);
+    pos = ff_start_tag(pb, "CNTI");
+    avio_w8(pb, 0); /* class */
+    avio_w8(pb, 1); /* type */
+    avio_w8(pb, 1); /* code type */
+    avio_w8(pb, 0); /* status */
+    avio_w8(pb, 0); /* counts */
+    end_tag_be(pb, pos);
+    pos = ff_start_tag(pb, "OPDA");
+    avio_write(pb, version, strlen(version)); /* metadata ("ST:songtitle,VN:version,...") */
+    end_tag_be(pb, pos);
+
+    avio_write(pb, "ATR\x00", 4);
+    avio_wb32(pb, 0);
+    mmf->atrpos = avio_tell(pb);
+    avio_w8(pb, 0); /* format type */
+    avio_w8(pb, 0); /* sequence type */
+    avio_w8(pb, (mmf->stereo << 7) | (1 << 4) | rate); /* (channel << 7) | (format << 4) | rate */
+    avio_w8(pb, 0); /* wave base bit */
+    avio_w8(pb, 2); /* time base d */
+    avio_w8(pb, 2); /* time base g */
+
+    ffio_wfourcc(pb, "Atsq");
+    avio_wb32(pb, 16);
+    mmf->atsqpos = avio_tell(pb);
+    /* Will be filled on close */
+    avio_write(pb, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16);
+
+    mmf->awapos = ff_start_tag(pb, "Awa\x01");
+
+    avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
+
+    avio_flush(pb);
+
+    return 0;
+}
+
+/* Write a variable-length symbol */
+static void put_varlength(AVIOContext *pb, int val)
+{
+    if(val < 128)
+        avio_w8(pb, val);
+    else {
+        val -= 128;
+        avio_w8(pb, 0x80 | val >> 7);
+        avio_w8(pb, 0x7f & val);
+    }
+}
+
+static int mmf_write_trailer(AVFormatContext *s)
+{
+    AVIOContext *pb = s->pb;
+    MMFContext *mmf = s->priv_data;
+    int64_t pos, size;
+    int gatetime;
+
+    if (s->pb->seekable) {
+        /* Fill in length fields */
+        end_tag_be(pb, mmf->awapos);
+        end_tag_be(pb, mmf->atrpos);
+        end_tag_be(pb, 8);
+
+        pos = avio_tell(pb);
+        size = pos - mmf->awapos;
+
+        /* Fill Atsq chunk */
+        avio_seek(pb, mmf->atsqpos, SEEK_SET);
+
+        /* "play wav" */
+        avio_w8(pb, 0); /* start time */
+        avio_w8(pb, (mmf->stereo << 6) | 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 */
+        avio_write(pb, "\xff\x00", 2); /* nop */
+
+        /* "end of sequence" */
+        avio_write(pb, "\x00\x00\x00\x00", 4);
+
+        avio_seek(pb, pos, SEEK_SET);
+
+        avio_flush(pb);
+    }
+    return 0;
+}
+#endif /* CONFIG_MMF_MUXER */
+
+static int mmf_probe(AVProbeData *p)
+{
+    /* check file header */
+    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)
+{
+    MMFContext *mmf = s->priv_data;
+    unsigned int tag;
+    AVIOContext *pb = s->pb;
+    AVStream *st;
+    int64_t size;
+    int rate, params;
+
+    tag = avio_rl32(pb);
+    if (tag != MKTAG('M', 'M', 'M', 'D'))
+        return AVERROR_INVALIDDATA;
+    avio_skip(pb, 4); /* file_size */
+
+    /* Skip some unused chunks that may or may not be present */
+    for(;; avio_skip(pb, size)) {
+        tag = avio_rl32(pb);
+        size = avio_rb32(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 AVERROR_PATCHWELCOME;
+    }
+    if ((tag & 0xffffff) != MKTAG('A', 'T', 'R', 0)) {
+        av_log(s, AV_LOG_ERROR, "Unsupported SMAF chunk %08x\n", tag);
+        return AVERROR_PATCHWELCOME;
+    }
+
+    avio_r8(pb); /* format type */
+    avio_r8(pb); /* sequence type */
+    params = avio_r8(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 AVERROR_INVALIDDATA;
+    }
+    avio_r8(pb); /* wave base bit */
+    avio_r8(pb); /* time base d */
+    avio_r8(pb); /* time base g */
+
+    /* Skip some unused chunks that may or may not be present */
+    for(;; avio_skip(pb, size)) {
+        tag = avio_rl32(pb);
+        size = avio_rb32(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 AVERROR_INVALIDDATA;
+    }
+    mmf->data_end = avio_tell(pb) + size;
+
+    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_ADPCM_YAMAHA;
+    st->codec->sample_rate = rate;
+    st->codec->channels = (params >> 7) + 1;
+    st->codec->channel_layout = params >> 7 ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
+    st->codec->bits_per_coded_sample = 4;
+    st->codec->bit_rate = st->codec->sample_rate * st->codec->bits_per_coded_sample;
+
+    avpriv_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;
+    int64_t left, size;
+    int ret;
+
+    left = mmf->data_end - avio_tell(s->pb);
+    size = FFMIN(left, MAX_SIZE);
+    if (url_feof(s->pb) || size <= 0)
+        return AVERROR_EOF;
+
+    ret = av_get_packet(s->pb, pkt, size);
+    if (ret < 0)
+        return ret;
+
+    pkt->stream_index = 0;
+
+    return ret;
+}
+
+#if CONFIG_MMF_DEMUXER
+AVInputFormat ff_mmf_demuxer = {
+    .name           = "mmf",
+    .long_name      = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
+    .priv_data_size = sizeof(MMFContext),
+    .read_probe     = mmf_probe,
+    .read_header    = mmf_read_header,
+    .read_packet    = mmf_read_packet,
+    .flags          = AVFMT_GENERIC_INDEX,
+};
+#endif
+#if CONFIG_MMF_MUXER
+AVOutputFormat ff_mmf_muxer = {
+    .name              = "mmf",
+    .long_name         = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
+    .mime_type         = "application/vnd.smaf",
+    .extensions        = "mmf",
+    .priv_data_size    = sizeof(MMFContext),
+    .audio_codec       = AV_CODEC_ID_ADPCM_YAMAHA,
+    .video_codec       = AV_CODEC_ID_NONE,
+    .write_header      = mmf_write_header,
+    .write_packet      = ff_raw_write_packet,
+    .write_trailer     = mmf_write_trailer,
+};
+#endif