d61240f8c9
Up until now, we had a PacketList structure which is actually a PacketListEntry; a proper PacketList did not exist and all the related functions just passed pointers to pointers to the head and tail elements around. All these pointers were actually consecutive elements of their containing structs, i.e. the users already treated them as if they were a struct. So add a proper PacketList struct and rename the current PacketList to PacketListEntry; also make the functions use this structure instead of the pair of pointers. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
302 lines
9.2 KiB
C
302 lines
9.2 KiB
C
/*
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* AIFF/AIFF-C muxer
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* Copyright (c) 2006 Patrick Guimond
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include "libavutil/intfloat.h"
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#include "libavutil/opt.h"
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#include "libavcodec/packet_internal.h"
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#include "avformat.h"
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#include "internal.h"
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#include "aiff.h"
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#include "avio_internal.h"
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#include "isom.h"
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#include "id3v2.h"
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typedef struct AIFFOutputContext {
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const AVClass *class;
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int64_t form;
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int64_t frames;
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int64_t ssnd;
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int audio_stream_idx;
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PacketList pict_list;
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int write_id3v2;
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int id3v2_version;
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} AIFFOutputContext;
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static int put_id3v2_tags(AVFormatContext *s, AIFFOutputContext *aiff)
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{
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int ret;
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uint64_t pos, end, size;
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ID3v2EncContext id3v2 = { 0 };
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AVIOContext *pb = s->pb;
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PacketListEntry *list_entry = aiff->pict_list.head;
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if (!s->metadata && !s->nb_chapters && !list_entry)
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return 0;
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avio_wl32(pb, MKTAG('I', 'D', '3', ' '));
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avio_wb32(pb, 0);
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pos = avio_tell(pb);
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ff_id3v2_start(&id3v2, pb, aiff->id3v2_version, ID3v2_DEFAULT_MAGIC);
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ff_id3v2_write_metadata(s, &id3v2);
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while (list_entry) {
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if ((ret = ff_id3v2_write_apic(s, &id3v2, &list_entry->pkt)) < 0)
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return ret;
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list_entry = list_entry->next;
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}
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ff_id3v2_finish(&id3v2, pb, s->metadata_header_padding);
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end = avio_tell(pb);
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size = end - pos;
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/* Update chunk size */
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avio_seek(pb, pos - 4, SEEK_SET);
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avio_wb32(pb, size);
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avio_seek(pb, end, SEEK_SET);
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if (size & 1)
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avio_w8(pb, 0);
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return 0;
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}
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static void put_meta(AVFormatContext *s, const char *key, uint32_t id)
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{
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AVDictionaryEntry *tag;
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AVIOContext *pb = s->pb;
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if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
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int size = strlen(tag->value);
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avio_wl32(pb, id);
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avio_wb32(pb, FFALIGN(size, 2));
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avio_write(pb, tag->value, size);
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if (size & 1)
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avio_w8(pb, 0);
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}
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}
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static int aiff_write_header(AVFormatContext *s)
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{
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AIFFOutputContext *aiff = s->priv_data;
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AVIOContext *pb = s->pb;
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AVCodecParameters *par;
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uint64_t sample_rate;
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int i, aifc = 0;
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aiff->audio_stream_idx = -1;
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for (i = 0; i < s->nb_streams; i++) {
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AVStream *st = s->streams[i];
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if (aiff->audio_stream_idx < 0 && st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
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aiff->audio_stream_idx = i;
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} else if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO) {
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av_log(s, AV_LOG_ERROR, "AIFF allows only one audio stream and a picture.\n");
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return AVERROR(EINVAL);
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}
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}
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if (aiff->audio_stream_idx < 0) {
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av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
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return AVERROR(EINVAL);
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}
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par = s->streams[aiff->audio_stream_idx]->codecpar;
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/* First verify if format is ok */
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if (!par->codec_tag)
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return AVERROR(EINVAL);
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if (par->codec_tag != MKTAG('N','O','N','E'))
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aifc = 1;
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/* FORM AIFF header */
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ffio_wfourcc(pb, "FORM");
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aiff->form = avio_tell(pb);
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avio_wb32(pb, 0); /* file length */
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ffio_wfourcc(pb, aifc ? "AIFC" : "AIFF");
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if (aifc) { // compressed audio
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if (!par->block_align) {
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av_log(s, AV_LOG_ERROR, "block align not set\n");
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return AVERROR(EINVAL);
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}
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/* Version chunk */
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ffio_wfourcc(pb, "FVER");
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avio_wb32(pb, 4);
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avio_wb32(pb, 0xA2805140);
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}
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if (par->channels > 2 && par->channel_layout) {
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ffio_wfourcc(pb, "CHAN");
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avio_wb32(pb, 12);
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ff_mov_write_chan(pb, par->channel_layout);
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}
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put_meta(s, "title", MKTAG('N', 'A', 'M', 'E'));
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put_meta(s, "author", MKTAG('A', 'U', 'T', 'H'));
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put_meta(s, "copyright", MKTAG('(', 'c', ')', ' '));
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put_meta(s, "comment", MKTAG('A', 'N', 'N', 'O'));
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/* Common chunk */
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ffio_wfourcc(pb, "COMM");
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avio_wb32(pb, aifc ? 24 : 18); /* size */
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avio_wb16(pb, par->channels); /* Number of channels */
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aiff->frames = avio_tell(pb);
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avio_wb32(pb, 0); /* Number of frames */
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if (!par->bits_per_coded_sample)
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par->bits_per_coded_sample = av_get_bits_per_sample(par->codec_id);
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if (!par->bits_per_coded_sample) {
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av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
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return AVERROR(EINVAL);
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}
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if (!par->block_align)
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par->block_align = (par->bits_per_coded_sample * par->channels) >> 3;
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avio_wb16(pb, par->bits_per_coded_sample); /* Sample size */
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sample_rate = av_double2int(par->sample_rate);
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avio_wb16(pb, (sample_rate >> 52) + (16383 - 1023));
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avio_wb64(pb, UINT64_C(1) << 63 | sample_rate << 11);
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if (aifc) {
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avio_wl32(pb, par->codec_tag);
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avio_wb16(pb, 0);
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}
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if ( (par->codec_tag == MKTAG('Q','D','M','2')
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|| par->codec_tag == MKTAG('Q','c','l','p')) && par->extradata_size) {
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ffio_wfourcc(pb, "wave");
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avio_wb32(pb, par->extradata_size);
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avio_write(pb, par->extradata, par->extradata_size);
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}
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/* Sound data chunk */
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ffio_wfourcc(pb, "SSND");
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aiff->ssnd = avio_tell(pb); /* Sound chunk size */
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avio_wb32(pb, 0); /* Sound samples data size */
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avio_wb32(pb, 0); /* Data offset */
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avio_wb32(pb, 0); /* Block-size (block align) */
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avpriv_set_pts_info(s->streams[aiff->audio_stream_idx], 64, 1,
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s->streams[aiff->audio_stream_idx]->codecpar->sample_rate);
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return 0;
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}
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static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AIFFOutputContext *aiff = s->priv_data;
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AVIOContext *pb = s->pb;
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if (pkt->stream_index == aiff->audio_stream_idx)
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avio_write(pb, pkt->data, pkt->size);
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else {
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/* warn only once for each stream */
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if (s->streams[pkt->stream_index]->nb_frames == 1) {
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av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
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" ignoring.\n", pkt->stream_index);
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}
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if (s->streams[pkt->stream_index]->nb_frames >= 1)
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return 0;
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return avpriv_packet_list_put(&aiff->pict_list, pkt, NULL, 0);
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}
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return 0;
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}
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static int aiff_write_trailer(AVFormatContext *s)
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{
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int ret = 0;
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AVIOContext *pb = s->pb;
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AIFFOutputContext *aiff = s->priv_data;
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AVCodecParameters *par = s->streams[aiff->audio_stream_idx]->codecpar;
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/* Chunks sizes must be even */
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int64_t file_size, data_size;
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data_size = avio_tell(pb);
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if (data_size & 1)
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avio_w8(pb, 0);
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if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
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/* Write ID3 tags */
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if (aiff->write_id3v2)
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if ((ret = put_id3v2_tags(s, aiff)) < 0)
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return ret;
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/* File length */
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file_size = avio_tell(pb);
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avio_seek(pb, aiff->form, SEEK_SET);
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avio_wb32(pb, file_size - aiff->form - 4);
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/* Number of sample frames */
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avio_seek(pb, aiff->frames, SEEK_SET);
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avio_wb32(pb, (data_size - aiff->ssnd - 12) / par->block_align);
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/* Sound Data chunk size */
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avio_seek(pb, aiff->ssnd, SEEK_SET);
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avio_wb32(pb, data_size - aiff->ssnd - 4);
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}
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return ret;
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}
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static void aiff_deinit(AVFormatContext *s)
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{
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AIFFOutputContext *aiff = s->priv_data;
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avpriv_packet_list_free(&aiff->pict_list);
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}
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#define OFFSET(x) offsetof(AIFFOutputContext, x)
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#define ENC AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{ "write_id3v2", "Enable ID3 tags writing.",
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OFFSET(write_id3v2), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, ENC },
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{ "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
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OFFSET(id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 3, 4, ENC },
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{ NULL },
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};
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static const AVClass aiff_muxer_class = {
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.class_name = "AIFF muxer",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const AVOutputFormat ff_aiff_muxer = {
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.name = "aiff",
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.long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
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.mime_type = "audio/aiff",
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.extensions = "aif,aiff,afc,aifc",
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.priv_data_size = sizeof(AIFFOutputContext),
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.audio_codec = AV_CODEC_ID_PCM_S16BE,
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.video_codec = AV_CODEC_ID_PNG,
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.write_header = aiff_write_header,
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.write_packet = aiff_write_packet,
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.write_trailer = aiff_write_trailer,
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.deinit = aiff_deinit,
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.codec_tag = ff_aiff_codec_tags_list,
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.priv_class = &aiff_muxer_class,
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};
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