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authorPeter Ross <pross@xvid.org>2009-09-16 12:26:59 +0000
committerPeter Ross <pross@xvid.org>2009-09-16 12:26:59 +0000
commit5f14b5659383f70bb0f03266d551e394136dd1d6 (patch)
treeb3dfa731f1f8a08f31f0b97931878f555c311c9c
parent2d423666c0c01e26c64ab515078c0120945a85dc (diff)
downloadffmpeg-5f14b5659383f70bb0f03266d551e394136dd1d6.tar.gz
Core Audio Format demuxer
Originally committed as revision 19879 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r--Changelog1
-rw-r--r--doc/general.texi2
-rw-r--r--libavformat/Makefile1
-rw-r--r--libavformat/allformats.c1
-rw-r--r--libavformat/caf.c58
-rw-r--r--libavformat/caf.h34
-rw-r--r--libavformat/cafdec.c379
7 files changed, 476 insertions, 0 deletions
diff --git a/Changelog b/Changelog
index a639df36d4..65e71cfe8b 100644
--- a/Changelog
+++ b/Changelog
@@ -37,6 +37,7 @@ version <next>:
- Bluray (PGS) subtitle decoder
- LPCM support in MPEG-TS (HDMV RID as found on Blu-ray disks)
- Wmapro decoder
+- Core Audio Format demuxer
diff --git a/doc/general.texi b/doc/general.texi
index 18dd43e482..d0d472e6d5 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -63,6 +63,8 @@ library:
@tab Used in the game Cyberia from Interplay.
@item Delphine Software International CIN @tab @tab X
@tab Multimedia format used by Delphine Software games.
+@item Core Audio Format @tab @tab X
+ @tab Apple Core Audio Format
@item CRC testing format @tab X @tab
@item Creative Voice @tab X @tab X
@tab Created for the Sound Blaster Pro.
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 89b6ce2a45..72203cf753 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -32,6 +32,7 @@ OBJS-$(CONFIG_AVS_DEMUXER) += avs.o vocdec.o voc.o
OBJS-$(CONFIG_BETHSOFTVID_DEMUXER) += bethsoftvid.o
OBJS-$(CONFIG_BFI_DEMUXER) += bfi.o
OBJS-$(CONFIG_C93_DEMUXER) += c93.o vocdec.o voc.o
+OBJS-$(CONFIG_CAF_DEMUXER) += cafdec.o caf.o mov.o riff.o isom.o
OBJS-$(CONFIG_CAVSVIDEO_DEMUXER) += raw.o
OBJS-$(CONFIG_CRC_MUXER) += crcenc.o
OBJS-$(CONFIG_DAUD_DEMUXER) += daud.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index d80d37aae7..34b50cdb8b 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -65,6 +65,7 @@ void av_register_all(void)
REGISTER_DEMUXER (BETHSOFTVID, bethsoftvid);
REGISTER_DEMUXER (BFI, bfi);
REGISTER_DEMUXER (C93, c93);
+ REGISTER_DEMUXER (CAF, caf);
REGISTER_DEMUXER (CAVSVIDEO, cavsvideo);
REGISTER_MUXER (CRC, crc);
REGISTER_MUXDEMUX (DAUD, daud);
diff --git a/libavformat/caf.c b/libavformat/caf.c
new file mode 100644
index 0000000000..98f7f78fa3
--- /dev/null
+++ b/libavformat/caf.c
@@ -0,0 +1,58 @@
+/*
+ * CAF common code
+ * Copyright (c) 2007 Justin Ruggles
+ *
+ * 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
+ */
+
+/**
+ * @file libavformat/caf.c
+ * CAF common code
+ */
+
+#include "avformat.h"
+#include "riff.h"
+#include "caf.h"
+
+/**
+ * Known codec tags for CAF
+ */
+const AVCodecTag ff_codec_caf_tags[] = {
+ { CODEC_ID_AAC, MKBETAG('a','a','c',' ') },
+ { CODEC_ID_AC3, MKBETAG('a','c','-','3') },
+ { CODEC_ID_ALAC, MKBETAG('a','l','a','c') },
+ /* FIXME: use DV demuxer, as done in MOV */
+ /*{ CODEC_ID_DVAUDIO, MKBETAG('v','d','v','a') },*/
+ /*{ CODEC_ID_DVAUDIO, MKBETAG('d','v','c','a') },*/
+ { CODEC_ID_ADPCM_IMA_QT, MKBETAG('i','m','a','4') },
+ { CODEC_ID_MACE3, MKBETAG('M','A','C','3') },
+ { CODEC_ID_MACE6, MKBETAG('M','A','C','6') },
+ { CODEC_ID_MP3, MKBETAG('.','m','p','3') },
+ { CODEC_ID_MP2, MKBETAG('.','m','p','2') },
+ { CODEC_ID_MP1, MKBETAG('.','m','p','1') },
+ { CODEC_ID_PCM_ALAW, MKBETAG('a','l','a','w') },
+ { CODEC_ID_PCM_MULAW, MKBETAG('u','l','a','w') },
+ { CODEC_ID_QCELP, MKBETAG('Q','c','l','p') },
+ { CODEC_ID_QDM2, MKBETAG('Q','D','M','2') },
+ { CODEC_ID_QDM2, MKBETAG('Q','D','M','C') },
+ /* currently unsupported codecs */
+ /*{ AC-3 over S/PDIF MKBETAG('c','a','c','3') },*/
+ /*{ MPEG4CELP MKBETAG('c','e','l','p') },*/
+ /*{ MPEG4HVXC MKBETAG('h','v','x','c') },*/
+ /*{ MPEG4TwinVQ MKBETAG('t','w','v','q') },*/
+ { 0, 0 },
+};
diff --git a/libavformat/caf.h b/libavformat/caf.h
new file mode 100644
index 0000000000..43f3d96de6
--- /dev/null
+++ b/libavformat/caf.h
@@ -0,0 +1,34 @@
+/*
+ * CAF common code
+ * Copyright (c) 2007 Justin Ruggles
+ *
+ * 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
+ */
+
+/**
+ * @file libavformat/caf.h
+ * CAF common code
+ */
+
+#ifndef AVFORMAT_CAF_H
+#define AVFORMAT_CAF_H
+
+#include "avformat.h"
+
+extern const AVCodecTag ff_codec_caf_tags[];
+
+#endif /* AVFORMAT_CAF_H */
diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
new file mode 100644
index 0000000000..c4aad1bbfa
--- /dev/null
+++ b/libavformat/cafdec.c
@@ -0,0 +1,379 @@
+/*
+ * Core Audio Format demuxer
+ * Copyright (c) 2007 Justin Ruggles
+ * Copyright (c) 2009 Peter Ross
+ *
+ * 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
+ */
+
+/**
+ * @file libavformat/cafdec.c
+ * Core Audio Format demuxer
+ */
+
+#include "avformat.h"
+#include "riff.h"
+#include "isom.h"
+#include "libavutil/intreadwrite.h"
+#include "caf.h"
+
+typedef struct {
+ int bytes_per_packet; ///< bytes in a packet, or 0 if variable
+ int frames_per_packet; ///< frames in a packet, or 0 if variable
+ int64_t num_bytes; ///< total number of bytes in stream
+
+ int64_t packet_cnt; ///< packet counter
+ int64_t frame_cnt; ///< frame counter
+
+ int64_t data_start; ///< data start position, in bytes
+ int64_t data_size; ///< raw data size, in bytes
+} CaffContext;
+
+static int probe(AVProbeData *p)
+{
+ if (AV_RB32(p->buf) == MKBETAG('c','a','f','f') && AV_RB16(&p->buf[4]) == 1)
+ return AVPROBE_SCORE_MAX;
+ return 0;
+}
+
+/** Read audio description chunk */
+static int read_desc_chunk(AVFormatContext *s)
+{
+ ByteIOContext *pb = s->pb;
+ CaffContext *caf = s->priv_data;
+ AVStream *st;
+ int flags;
+
+ /* new audio stream */
+ st = av_new_stream(s, 0);
+ if (!st)
+ return AVERROR_NOMEM;
+
+ /* parse format description */
+ st->codec->codec_type = CODEC_TYPE_AUDIO;
+ st->codec->sample_rate = av_int2dbl(get_be64(pb));
+ st->codec->codec_tag = get_be32(pb);
+ flags = get_be32(pb);
+ caf->bytes_per_packet = get_be32(pb);
+ st->codec->block_align = caf->bytes_per_packet;
+ caf->frames_per_packet = get_be32(pb);
+ st->codec->channels = get_be32(pb);
+ st->codec->bits_per_coded_sample = get_be32(pb);
+
+ /* calculate bit rate for constant size packets */
+ if (caf->frames_per_packet > 0 && caf->bytes_per_packet > 0) {
+ st->codec->bit_rate = (uint64_t)st->codec->sample_rate * (uint64_t)caf->bytes_per_packet * 8
+ / (uint64_t)caf->frames_per_packet;
+ } else {
+ st->codec->bit_rate = 0;
+ }
+
+ /* determine codec */
+ if (st->codec->codec_tag == MKBETAG('l','p','c','m'))
+ st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, (flags ^ 0x2) | 0x4);
+ else
+ st->codec->codec_id = ff_codec_get_id(ff_codec_caf_tags, st->codec->codec_tag);
+ return 0;
+}
+
+/** Read magic cookie chunk */
+static int read_kuki_chunk(AVFormatContext *s, int64_t size)
+{
+ ByteIOContext *pb = s->pb;
+ AVStream *st = s->streams[0];
+
+ if (size < 0 || size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
+ return -1;
+
+ if (st->codec->codec_id == CODEC_ID_AAC) {
+ /* The magic cookie format for AAC is an mp4 esds atom.
+ The lavc AAC decoder requires the data from the codec specific
+ description as extradata input. */
+ int strt, skip;
+ MOVAtom atom;
+
+ strt = url_ftell(pb);
+ ff_mov_read_esds(s, pb, atom);
+ skip = size - (url_ftell(pb) - strt);
+ if (skip < 0 || !st->codec->extradata ||
+ st->codec->codec_id != CODEC_ID_AAC) {
+ av_log(s, AV_LOG_ERROR, "invalid AAC magic cookie\n");
+ return AVERROR_INVALIDDATA;
+ }
+ url_fskip(pb, skip);
+ } else {
+ st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!st->codec->extradata)
+ return AVERROR(ENOMEM);
+ get_buffer(pb, st->codec->extradata, size);
+ st->codec->extradata_size = size;
+ }
+
+ return 0;
+}
+
+/** Read packet table chunk */
+static int read_pakt_chunk(AVFormatContext *s, int64_t size)
+{
+ ByteIOContext *pb = s->pb;
+ AVStream *st = s->streams[0];
+ CaffContext *caf = s->priv_data;
+ int64_t pos = 0, ccount;
+ int num_packets, i;
+
+ ccount = url_ftell(pb);
+
+ num_packets = get_be64(pb);
+ if (num_packets < 0 || INT32_MAX / sizeof(AVIndexEntry) < num_packets)
+ return AVERROR_INVALIDDATA;
+
+ st->nb_frames = get_be64(pb); /* valid frames */
+ st->nb_frames += get_be32(pb); /* priming frames */
+ st->nb_frames += get_be32(pb); /* remainder frames */
+
+ st->duration = 0;
+ for (i = 0; i < num_packets; i++) {
+ av_add_index_entry(s->streams[0], pos, st->duration, 0, 0, AVINDEX_KEYFRAME);
+ pos += caf->bytes_per_packet ? caf->bytes_per_packet : ff_mp4_read_descr_len(pb);
+ st->duration += caf->frames_per_packet ? caf->frames_per_packet : ff_mp4_read_descr_len(pb);
+ }
+
+ if (url_ftell(pb) - ccount != size) {
+ av_log(s, AV_LOG_ERROR, "error reading packet table\n");
+ return -1;
+ }
+
+ caf->num_bytes = pos;
+ return 0;
+}
+
+/** Read information chunk */
+static void read_info_chunk(AVFormatContext *s, int64_t size)
+{
+ ByteIOContext *pb = s->pb;
+ unsigned int i;
+ unsigned int nb_entries = get_be32(pb);
+ for (i = 0; i < nb_entries; i++) {
+ char key[32];
+ char value[1024];
+ get_strz(pb, key, sizeof(key));
+ get_strz(pb, value, sizeof(value));
+ av_metadata_set(&s->metadata, key, value);
+ }
+}
+
+static int read_header(AVFormatContext *s,
+ AVFormatParameters *ap)
+{
+ ByteIOContext *pb = s->pb;
+ CaffContext *caf = s->priv_data;
+ AVStream *st;
+ uint32_t tag = 0;
+ int found_data, ret;
+ int64_t size;
+
+ url_fskip(pb, 8); /* magic, version, file flags */
+
+ /* audio description chunk */
+ if (get_be32(pb) != MKBETAG('d','e','s','c')) {
+ av_log(s, AV_LOG_ERROR, "desc chunk not present\n");
+ return AVERROR_INVALIDDATA;
+ }
+ size = get_be64(pb);
+ if (size != 32)
+ return AVERROR_INVALIDDATA;
+
+ ret = read_desc_chunk(s);
+ if (ret)
+ return ret;
+ st = s->streams[0];
+
+ /* parse each chunk */
+ found_data = 0;
+ while (!url_feof(pb)) {
+
+ /* stop at data chunk if seeking is not supported or
+ data chunk size is unknown */
+ if (found_data && (caf->data_size < 0 || url_is_streamed(pb)))
+ break;
+
+ tag = get_be32(pb);
+ size = get_be64(pb);
+ if (url_feof(pb))
+ break;
+
+ switch (tag) {
+ case MKBETAG('d','a','t','a'):
+ url_fskip(pb, 4); /* edit count */
+ caf->data_start = url_ftell(pb);
+ caf->data_size = size < 0 ? -1 : size - 4;
+ if (caf->data_size > 0 && !url_is_streamed(pb))
+ url_fskip(pb, caf->data_size);
+ found_data = 1;
+ break;
+
+ /* magic cookie chunk */
+ case MKBETAG('k','u','k','i'):
+ if (read_kuki_chunk(s, size))
+ return AVERROR_INVALIDDATA;
+ break;
+
+ /* packet table chunk */
+ case MKBETAG('p','a','k','t'):
+ if (read_pakt_chunk(s, size))
+ return AVERROR_INVALIDDATA;
+ break;
+
+ case MKBETAG('i','n','f','o'):
+ read_info_chunk(s, size);
+ break;
+
+ default:
+#define _(x) ((x) >= ' ' ? (x) : ' ')
+ av_log(s, AV_LOG_WARNING, "skipping CAF chunk: %08X (%c%c%c%c)\n",
+ tag, _(tag>>24), _((tag>>16)&0xFF), _((tag>>8)&0xFF), _(tag&0xFF));
+#undef _
+ case MKBETAG('f','r','e','e'):
+ if (size < 0)
+ return AVERROR_INVALIDDATA;
+ url_fskip(pb, size);
+ break;
+ }
+ }
+
+ if (!found_data)
+ return AVERROR_INVALIDDATA;
+
+ if (caf->bytes_per_packet > 0 && caf->frames_per_packet > 0) {
+ if (caf->data_size > 0)
+ st->nb_frames = (caf->data_size / caf->bytes_per_packet) * caf->frames_per_packet;
+ } else if (st->nb_index_entries) {
+ st->codec->bit_rate = st->codec->sample_rate * caf->data_size * 8 /
+ st->duration;
+ } else {
+ av_log(s, AV_LOG_ERROR, "Missing packet table. It is required when "
+ "block size or frame size are variable.\n");
+ return AVERROR_INVALIDDATA;
+ }
+ s->file_size = url_fsize(pb);
+ s->file_size = FFMAX(0, s->file_size);
+
+ av_set_pts_info(st, 64, 1, st->codec->sample_rate);
+ st->start_time = 0;
+
+ /* position the stream at the start of data */
+ if (caf->data_size >= 0)
+ url_fseek(pb, caf->data_start, SEEK_SET);
+
+ return 0;
+}
+
+#define CAF_MAX_PKT_SIZE 4096
+
+static int read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ ByteIOContext *pb = s->pb;
+ AVStream *st = s->streams[0];
+ CaffContext *caf = s->priv_data;
+ int res, pkt_size = 0, pkt_frames = 0;
+ int64_t left = CAF_MAX_PKT_SIZE;
+
+ if (url_feof(pb))
+ return AVERROR_IO;
+
+ /* don't read past end of data chunk */
+ if (caf->data_size > 0) {
+ left = (caf->data_start + caf->data_size) - url_ftell(pb);
+ if (left <= 0)
+ return AVERROR_IO;
+ }
+
+ pkt_frames = caf->frames_per_packet;
+ pkt_size = caf->bytes_per_packet;
+
+ if (pkt_size > 0 && pkt_frames == 1) {
+ pkt_size = (CAF_MAX_PKT_SIZE / pkt_size) * pkt_size;
+ pkt_size = FFMIN(pkt_size, left);
+ pkt_frames = pkt_size / caf->bytes_per_packet;
+ } else if (st->nb_index_entries) {
+ if (caf->packet_cnt < st->nb_index_entries - 1) {
+ pkt_size = st->index_entries[caf->packet_cnt + 1].pos - st->index_entries[caf->packet_cnt].pos;
+ pkt_frames = st->index_entries[caf->packet_cnt + 1].timestamp - st->index_entries[caf->packet_cnt].timestamp;
+ } else if (caf->packet_cnt == st->nb_index_entries - 1) {
+ pkt_size = caf->num_bytes - st->index_entries[caf->packet_cnt].pos;
+ pkt_frames = st->duration - st->index_entries[caf->packet_cnt].timestamp;
+ } else {
+ return AVERROR_IO;
+ }
+ }
+
+ if (pkt_size == 0 || pkt_frames == 0 || pkt_size > left)
+ return AVERROR_IO;
+
+ res = av_get_packet(pb, pkt, pkt_size);
+ if (res < 0)
+ return res;
+
+ pkt->size = res;
+ pkt->stream_index = 0;
+ pkt->dts = pkt->pts = caf->frame_cnt;
+
+ caf->packet_cnt++;
+ caf->frame_cnt += pkt_frames;
+
+ return 0;
+}
+
+static int read_seek(AVFormatContext *s, int stream_index,
+ int64_t timestamp, int flags)
+{
+ AVStream *st = s->streams[0];
+ CaffContext *caf = s->priv_data;
+ int64_t pos;
+
+ timestamp = FFMAX(timestamp, 0);
+
+ if (caf->frames_per_packet > 0 && caf->bytes_per_packet > 0) {
+ /* calculate new byte position based on target frame position */
+ pos = caf->bytes_per_packet * timestamp / caf->frames_per_packet;
+ if (caf->data_size > 0)
+ pos = FFMIN(pos, caf->data_size);
+ caf->packet_cnt = pos / caf->bytes_per_packet;
+ caf->frame_cnt = caf->frames_per_packet * caf->packet_cnt;
+ } else if (st->nb_index_entries) {
+ caf->packet_cnt = av_index_search_timestamp(st, timestamp, flags);
+ caf->frame_cnt = st->index_entries[caf->packet_cnt].timestamp;
+ pos = st->index_entries[caf->packet_cnt].pos;
+ } else {
+ return -1;
+ }
+
+ url_fseek(s->pb, pos + caf->data_start, SEEK_SET);
+ return 0;
+}
+
+AVInputFormat caf_demuxer = {
+ "caf",
+ NULL_IF_CONFIG_SMALL("Apple Core Audio Format"),
+ sizeof(CaffContext),
+ probe,
+ read_header,
+ read_packet,
+ NULL,
+ read_seek,
+ .codec_tag = (const AVCodecTag*[]){ff_codec_caf_tags, 0},
+};