Split up the AIFF muxer and demuxer into separate files.

Originally committed as revision 20234 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 160 insertions, 0 deletions

diff --git a/libavformat/aiffenc.c b/libavformat/aiffenc.c
new file mode 100644
index 0000000000..e3c6a0b1bf
--- /dev/null
+++ b/libavformat/aiffenc.c
@@ -0,0 +1,160 @@
+/*
+ * AIFF/AIFF-C muxer
+ * Copyright (c) 2006  Patrick Guimond
+ *
+ * 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 "aiff.h"
+
+typedef struct {
+    int64_t form;
+    int64_t frames;
+    int64_t ssnd;
+} AIFFOutputContext;
+
+static int aiff_write_header(AVFormatContext *s)
+{
+    AIFFOutputContext *aiff = s->priv_data;
+    ByteIOContext *pb = s->pb;
+    AVCodecContext *enc = s->streams[0]->codec;
+    AVExtFloat sample_rate;
+    int aifc = 0;
+
+    /* First verify if format is ok */
+    if (!enc->codec_tag)
+        return -1;
+    if (enc->codec_tag != MKTAG('N','O','N','E'))
+        aifc = 1;
+
+    /* FORM AIFF header */
+    put_tag(pb, "FORM");
+    aiff->form = url_ftell(pb);
+    put_be32(pb, 0);                    /* file length */
+    put_tag(pb, aifc ? "AIFC" : "AIFF");
+
+    if (aifc) { // compressed audio
+        enc->bits_per_coded_sample = 16;
+        if (!enc->block_align) {
+            av_log(s, AV_LOG_ERROR, "block align not set\n");
+            return -1;
+        }
+        /* Version chunk */
+        put_tag(pb, "FVER");
+        put_be32(pb, 4);
+        put_be32(pb, 0xA2805140);
+    }
+
+    /* Common chunk */
+    put_tag(pb, "COMM");
+    put_be32(pb, aifc ? 24 : 18); /* size */
+    put_be16(pb, enc->channels);  /* Number of channels */
+
+    aiff->frames = url_ftell(pb);
+    put_be32(pb, 0);              /* Number of frames */
+
+    if (!enc->bits_per_coded_sample)
+        enc->bits_per_coded_sample = av_get_bits_per_sample(enc->codec_id);
+    if (!enc->bits_per_coded_sample) {
+        av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
+        return -1;
+    }
+    if (!enc->block_align)
+        enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3;
+
+    put_be16(pb, enc->bits_per_coded_sample); /* Sample size */
+
+    sample_rate = av_dbl2ext((double)enc->sample_rate);
+    put_buffer(pb, (uint8_t*)&sample_rate, sizeof(sample_rate));
+
+    if (aifc) {
+        put_le32(pb, enc->codec_tag);
+        put_be16(pb, 0);
+    }
+
+    /* Sound data chunk */
+    put_tag(pb, "SSND");
+    aiff->ssnd = url_ftell(pb);         /* Sound chunk size */
+    put_be32(pb, 0);                    /* Sound samples data size */
+    put_be32(pb, 0);                    /* Data offset */
+    put_be32(pb, 0);                    /* Block-size (block align) */
+
+    av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
+
+    /* Data is starting here */
+    put_flush_packet(pb);
+
+    return 0;
+}
+
+static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    ByteIOContext *pb = s->pb;
+    put_buffer(pb, pkt->data, pkt->size);
+    return 0;
+}
+
+static int aiff_write_trailer(AVFormatContext *s)
+{
+    ByteIOContext *pb = s->pb;
+    AIFFOutputContext *aiff = s->priv_data;
+    AVCodecContext *enc = s->streams[0]->codec;
+
+    /* Chunks sizes must be even */
+    int64_t file_size, end_size;
+    end_size = file_size = url_ftell(pb);
+    if (file_size & 1) {
+        put_byte(pb, 0);
+        end_size++;
+    }
+
+    if (!url_is_streamed(s->pb)) {
+        /* File length */
+        url_fseek(pb, aiff->form, SEEK_SET);
+        put_be32(pb, file_size - aiff->form - 4);
+
+        /* Number of sample frames */
+        url_fseek(pb, aiff->frames, SEEK_SET);
+        put_be32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
+
+        /* Sound Data chunk size */
+        url_fseek(pb, aiff->ssnd, SEEK_SET);
+        put_be32(pb, file_size - aiff->ssnd - 4);
+
+        /* return to the end */
+        url_fseek(pb, end_size, SEEK_SET);
+
+        put_flush_packet(pb);
+    }
+
+    return 0;
+}
+
+AVOutputFormat aiff_muxer = {
+    "aiff",
+    NULL_IF_CONFIG_SMALL("Audio IFF"),
+    "audio/aiff",
+    "aif,aiff,afc,aifc",
+    sizeof(AIFFOutputContext),
+    CODEC_ID_PCM_S16BE,
+    CODEC_ID_NONE,
+    aiff_write_header,
+    aiff_write_packet,
+    aiff_write_trailer,
+    .codec_tag= (const AVCodecTag* const []){ff_codec_aiff_tags, 0},
+};