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Diffstat (limited to 'ffmpeg/libavformat/aiffenc.c')
-rw-r--r--ffmpeg/libavformat/aiffenc.c332
1 files changed, 332 insertions, 0 deletions
diff --git a/ffmpeg/libavformat/aiffenc.c b/ffmpeg/libavformat/aiffenc.c
new file mode 100644
index 0000000..7c0b4fb
--- /dev/null
+++ b/ffmpeg/libavformat/aiffenc.c
@@ -0,0 +1,332 @@
+/*
+ * 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 "libavutil/intfloat.h"
+#include "libavutil/opt.h"
+#include "avformat.h"
+#include "internal.h"
+#include "aiff.h"
+#include "avio_internal.h"
+#include "isom.h"
+#include "id3v2.h"
+
+typedef struct {
+ const AVClass *class;
+ int64_t form;
+ int64_t frames;
+ int64_t ssnd;
+ int audio_stream_idx;
+ AVPacketList *pict_list;
+ int write_id3v2;
+ int id3v2_version;
+} AIFFOutputContext;
+
+static int put_id3v2_tags(AVFormatContext *s, AIFFOutputContext *aiff)
+{
+ int ret;
+ uint64_t pos, end, size;
+ ID3v2EncContext id3v2 = { 0 };
+ AVIOContext *pb = s->pb;
+ AVPacketList *pict_list = aiff->pict_list;
+
+ if (!pb->seekable)
+ return 0;
+
+ if (!s->metadata && !aiff->pict_list)
+ return 0;
+
+ avio_wl32(pb, MKTAG('I', 'D', '3', ' '));
+ avio_wb32(pb, 0);
+ pos = avio_tell(pb);
+
+ ff_id3v2_start(&id3v2, pb, aiff->id3v2_version, ID3v2_DEFAULT_MAGIC);
+ ff_id3v2_write_metadata(s, &id3v2);
+ while (pict_list) {
+ if ((ret = ff_id3v2_write_apic(s, &id3v2, &pict_list->pkt)) < 0)
+ return ret;
+ pict_list = pict_list->next;
+ }
+ ff_id3v2_finish(&id3v2, pb);
+
+ end = avio_tell(pb);
+ size = end - pos;
+
+ /* Update chunk size */
+ avio_seek(pb, pos - 4, SEEK_SET);
+ avio_wb32(pb, size);
+ avio_seek(pb, end, SEEK_SET);
+
+ if (size & 1)
+ avio_w8(pb, 0);
+
+ return 0;
+}
+
+static void put_meta(AVFormatContext *s, const char *key, uint32_t id)
+{
+ AVDictionaryEntry *tag;
+ AVIOContext *pb = s->pb;
+
+ if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
+ int size = strlen(tag->value);
+
+ avio_wl32(pb, id);
+ avio_wb32(pb, FFALIGN(size, 2));
+ avio_write(pb, tag->value, size);
+ if (size & 1)
+ avio_w8(pb, 0);
+ }
+}
+
+static int aiff_write_header(AVFormatContext *s)
+{
+ AIFFOutputContext *aiff = s->priv_data;
+ AVIOContext *pb = s->pb;
+ AVCodecContext *enc;
+ uint64_t sample_rate;
+ int i, aifc = 0;
+
+ aiff->audio_stream_idx = -1;
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream *st = s->streams[i];
+ if (aiff->audio_stream_idx < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+ aiff->audio_stream_idx = i;
+ } else if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO) {
+ av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in AIFF.\n");
+ return AVERROR(EINVAL);
+ }
+ }
+ if (aiff->audio_stream_idx < 0) {
+ av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
+ return AVERROR(EINVAL);
+ }
+
+ enc = s->streams[aiff->audio_stream_idx]->codec;
+
+ /* 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 */
+ ffio_wfourcc(pb, "FORM");
+ aiff->form = avio_tell(pb);
+ avio_wb32(pb, 0); /* file length */
+ ffio_wfourcc(pb, aifc ? "AIFC" : "AIFF");
+
+ if (aifc) { // compressed audio
+ if (!enc->block_align) {
+ av_log(s, AV_LOG_ERROR, "block align not set\n");
+ return -1;
+ }
+ /* Version chunk */
+ ffio_wfourcc(pb, "FVER");
+ avio_wb32(pb, 4);
+ avio_wb32(pb, 0xA2805140);
+ }
+
+ if (enc->channels > 2 && enc->channel_layout) {
+ ffio_wfourcc(pb, "CHAN");
+ avio_wb32(pb, 12);
+ ff_mov_write_chan(pb, enc->channel_layout);
+ }
+
+ put_meta(s, "title", MKTAG('N', 'A', 'M', 'E'));
+ put_meta(s, "author", MKTAG('A', 'U', 'T', 'H'));
+ put_meta(s, "copyright", MKTAG('(', 'c', ')', ' '));
+ put_meta(s, "comment", MKTAG('A', 'N', 'N', 'O'));
+
+ /* Common chunk */
+ ffio_wfourcc(pb, "COMM");
+ avio_wb32(pb, aifc ? 24 : 18); /* size */
+ avio_wb16(pb, enc->channels); /* Number of channels */
+
+ aiff->frames = avio_tell(pb);
+ avio_wb32(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;
+
+ avio_wb16(pb, enc->bits_per_coded_sample); /* Sample size */
+
+ sample_rate = av_double2int(enc->sample_rate);
+ avio_wb16(pb, (sample_rate >> 52) + (16383 - 1023));
+ avio_wb64(pb, UINT64_C(1) << 63 | sample_rate << 11);
+
+ if (aifc) {
+ avio_wl32(pb, enc->codec_tag);
+ avio_wb16(pb, 0);
+ }
+
+ if (enc->codec_tag == MKTAG('Q','D','M','2') && enc->extradata_size) {
+ ffio_wfourcc(pb, "wave");
+ avio_wb32(pb, enc->extradata_size);
+ avio_write(pb, enc->extradata, enc->extradata_size);
+ }
+
+ /* Sound data chunk */
+ ffio_wfourcc(pb, "SSND");
+ aiff->ssnd = avio_tell(pb); /* Sound chunk size */
+ avio_wb32(pb, 0); /* Sound samples data size */
+ avio_wb32(pb, 0); /* Data offset */
+ avio_wb32(pb, 0); /* Block-size (block align) */
+
+ avpriv_set_pts_info(s->streams[aiff->audio_stream_idx], 64, 1,
+ s->streams[aiff->audio_stream_idx]->codec->sample_rate);
+
+ /* Data is starting here */
+ avio_flush(pb);
+
+ return 0;
+}
+
+static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ AIFFOutputContext *aiff = s->priv_data;
+ AVIOContext *pb = s->pb;
+ if (pkt->stream_index == aiff->audio_stream_idx)
+ avio_write(pb, pkt->data, pkt->size);
+ else {
+ int ret;
+ AVPacketList *pict_list, *last;
+
+ if (s->streams[pkt->stream_index]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
+ return 0;
+
+ /* warn only once for each stream */
+ if (s->streams[pkt->stream_index]->nb_frames == 1) {
+ av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
+ " ignoring.\n", pkt->stream_index);
+ }
+ if (s->streams[pkt->stream_index]->nb_frames >= 1)
+ return 0;
+
+ pict_list = av_mallocz(sizeof(AVPacketList));
+ if (!pict_list)
+ return AVERROR(ENOMEM);
+
+ if ((ret = av_copy_packet(&pict_list->pkt, pkt)) < 0) {
+ av_freep(&pict_list);
+ return ret;
+ }
+
+ if (!aiff->pict_list)
+ aiff->pict_list = pict_list;
+ else {
+ last = aiff->pict_list;
+ while (last->next)
+ last = last->next;
+ last->next = pict_list;
+ }
+ }
+
+ return 0;
+}
+
+static int aiff_write_trailer(AVFormatContext *s)
+{
+ int ret;
+ AVIOContext *pb = s->pb;
+ AIFFOutputContext *aiff = s->priv_data;
+ AVPacketList *pict_list = aiff->pict_list;
+ AVCodecContext *enc = s->streams[aiff->audio_stream_idx]->codec;
+
+ /* Chunks sizes must be even */
+ int64_t file_size, end_size;
+ end_size = file_size = avio_tell(pb);
+ if (file_size & 1) {
+ avio_w8(pb, 0);
+ end_size++;
+ }
+
+ if (s->pb->seekable) {
+ /* Number of sample frames */
+ avio_seek(pb, aiff->frames, SEEK_SET);
+ avio_wb32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
+
+ /* Sound Data chunk size */
+ avio_seek(pb, aiff->ssnd, SEEK_SET);
+ avio_wb32(pb, file_size - aiff->ssnd - 4);
+
+ /* return to the end */
+ avio_seek(pb, end_size, SEEK_SET);
+
+ /* Write ID3 tags */
+ if (aiff->write_id3v2)
+ if ((ret = put_id3v2_tags(s, aiff)) < 0)
+ return ret;
+
+ /* File length */
+ file_size = avio_tell(pb);
+ avio_seek(pb, aiff->form, SEEK_SET);
+ avio_wb32(pb, file_size - aiff->form - 4);
+
+ avio_flush(pb);
+ }
+
+ while (pict_list) {
+ AVPacketList *next = pict_list->next;
+ av_free_packet(&pict_list->pkt);
+ av_freep(&pict_list);
+ pict_list = next;
+ }
+
+ return 0;
+}
+
+#define OFFSET(x) offsetof(AIFFOutputContext, x)
+#define ENC AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+ { "write_id3v2", "Enable ID3 tags writing.",
+ OFFSET(write_id3v2), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, ENC },
+ { "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
+ OFFSET(id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 3, 4, ENC },
+ { NULL },
+};
+
+static const AVClass aiff_muxer_class = {
+ .class_name = "AIFF muxer",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVOutputFormat ff_aiff_muxer = {
+ .name = "aiff",
+ .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
+ .mime_type = "audio/aiff",
+ .extensions = "aif,aiff,afc,aifc",
+ .priv_data_size = sizeof(AIFFOutputContext),
+ .audio_codec = AV_CODEC_ID_PCM_S16BE,
+ .video_codec = AV_CODEC_ID_PNG,
+ .write_header = aiff_write_header,
+ .write_packet = aiff_write_packet,
+ .write_trailer = aiff_write_trailer,
+ .codec_tag = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 },
+ .priv_class = &aiff_muxer_class,
+};
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