mirror of
https://git.videolan.org/git/ffmpeg.git
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507 lines
15 KiB
C
507 lines
15 KiB
C
/*
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* WAV demuxer
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* Copyright (c) 2001, 2002 Fabrice Bellard
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*
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* Sony Wave64 demuxer
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* RF64 demuxer
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* Copyright (c) 2009 Daniel Verkamp
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "libavutil/avassert.h"
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#include "libavutil/dict.h"
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#include "libavutil/log.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/opt.h"
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#include "avformat.h"
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#include "internal.h"
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#include "avio_internal.h"
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#include "pcm.h"
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#include "riff.h"
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#include "avio.h"
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#include "metadata.h"
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typedef struct WAVDemuxContext {
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int64_t data_end;
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int w64;
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} WAVDemuxContext;
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#if CONFIG_WAV_DEMUXER
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static int64_t next_tag(AVIOContext *pb, uint32_t *tag)
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{
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*tag = avio_rl32(pb);
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return avio_rl32(pb);
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}
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/* return the size of the found tag */
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static int64_t find_tag(AVIOContext *pb, uint32_t tag1)
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{
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unsigned int tag;
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int64_t size;
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for (;;) {
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if (pb->eof_reached)
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return -1;
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size = next_tag(pb, &tag);
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if (tag == tag1)
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break;
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avio_skip(pb, size);
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}
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return size;
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}
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static int wav_probe(AVProbeData *p)
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{
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/* check file header */
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if (p->buf_size <= 32)
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return 0;
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if (!memcmp(p->buf + 8, "WAVE", 4)) {
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if (!memcmp(p->buf, "RIFF", 4))
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/*
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Since ACT demuxer has standard WAV header at top of it's own,
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returning score is decreased to avoid probe conflict
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between ACT and WAV.
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*/
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return AVPROBE_SCORE_MAX - 1;
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else if (!memcmp(p->buf, "RF64", 4) &&
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!memcmp(p->buf + 12, "ds64", 4))
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return AVPROBE_SCORE_MAX;
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}
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return 0;
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}
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static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
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{
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AVIOContext *pb = s->pb;
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int ret;
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/* parse fmt header */
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*st = avformat_new_stream(s, NULL);
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if (!*st)
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return AVERROR(ENOMEM);
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ret = ff_get_wav_header(pb, (*st)->codec, size);
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if (ret < 0)
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return ret;
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(*st)->need_parsing = AVSTREAM_PARSE_FULL;
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avpriv_set_pts_info(*st, 64, 1, (*st)->codec->sample_rate);
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return 0;
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}
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static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
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int length)
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{
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char temp[257];
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int ret;
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av_assert0(length <= sizeof(temp));
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if ((ret = avio_read(s->pb, temp, length)) < 0)
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return ret;
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temp[length] = 0;
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if (strlen(temp))
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return av_dict_set(&s->metadata, key, temp, 0);
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return 0;
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}
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static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
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{
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char temp[131], *coding_history;
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int ret, x;
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uint64_t time_reference;
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int64_t umid_parts[8], umid_mask = 0;
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if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
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(ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
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(ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
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(ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
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(ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
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return ret;
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time_reference = avio_rl64(s->pb);
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snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
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if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
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return ret;
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/* check if version is >= 1, in which case an UMID may be present */
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if (avio_rl16(s->pb) >= 1) {
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for (x = 0; x < 8; x++)
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umid_mask |= umid_parts[x] = avio_rb64(s->pb);
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if (umid_mask) {
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/* the string formatting below is per SMPTE 330M-2004 Annex C */
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if (umid_parts[4] == 0 && umid_parts[5] == 0 && umid_parts[6] == 0 && umid_parts[7] == 0) {
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/* basic UMID */
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snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
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umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3]);
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} else {
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/* extended UMID */
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snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
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"0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
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umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3],
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umid_parts[4], umid_parts[5], umid_parts[6], umid_parts[7]);
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}
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if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
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return ret;
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}
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avio_skip(s->pb, 190);
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} else
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avio_skip(s->pb, 254);
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if (size > 602) {
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/* CodingHistory present */
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size -= 602;
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if (!(coding_history = av_malloc(size+1)))
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return AVERROR(ENOMEM);
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if ((ret = avio_read(s->pb, coding_history, size)) < 0)
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return ret;
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coding_history[size] = 0;
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if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
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AV_DICT_DONT_STRDUP_VAL)) < 0)
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return ret;
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}
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return 0;
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}
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static const AVMetadataConv wav_metadata_conv[] = {
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{"description", "comment" },
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{"originator", "encoded_by" },
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{"origination_date", "date" },
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{"origination_time", "creation_time"},
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{0},
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};
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/* wav input */
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static int wav_read_header(AVFormatContext *s)
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{
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int64_t size, av_uninit(data_size);
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int64_t sample_count=0;
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int rf64;
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uint32_t tag;
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AVIOContext *pb = s->pb;
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AVStream *st = NULL;
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WAVDemuxContext *wav = s->priv_data;
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int ret, got_fmt = 0;
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int64_t next_tag_ofs, data_ofs = -1;
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/* check RIFF header */
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tag = avio_rl32(pb);
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rf64 = tag == MKTAG('R', 'F', '6', '4');
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if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F'))
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return -1;
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avio_rl32(pb); /* file size */
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tag = avio_rl32(pb);
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if (tag != MKTAG('W', 'A', 'V', 'E'))
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return -1;
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if (rf64) {
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if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
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return -1;
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size = avio_rl32(pb);
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if (size < 16)
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return -1;
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avio_rl64(pb); /* RIFF size */
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data_size = avio_rl64(pb);
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sample_count = avio_rl64(pb);
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if (data_size < 0 || sample_count < 0) {
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av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
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"ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
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data_size, sample_count);
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return AVERROR_INVALIDDATA;
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}
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avio_skip(pb, size - 16); /* skip rest of ds64 chunk */
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}
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for (;;) {
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size = next_tag(pb, &tag);
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next_tag_ofs = avio_tell(pb) + size;
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if (pb->eof_reached)
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break;
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switch (tag) {
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case MKTAG('f', 'm', 't', ' '):
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/* only parse the first 'fmt ' tag found */
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if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st) < 0)) {
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return ret;
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} else if (got_fmt)
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av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
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got_fmt = 1;
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break;
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case MKTAG('d', 'a', 't', 'a'):
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if (!got_fmt) {
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av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'data' tag\n");
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return AVERROR_INVALIDDATA;
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}
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if (rf64) {
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next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
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} else {
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data_size = size;
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next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
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}
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data_ofs = avio_tell(pb);
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/* don't look for footer metadata if we can't seek or if we don't
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* know where the data tag ends
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*/
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if (!pb->seekable || (!rf64 && !size))
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goto break_loop;
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break;
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case MKTAG('f','a','c','t'):
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if (!sample_count)
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sample_count = avio_rl32(pb);
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break;
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case MKTAG('b','e','x','t'):
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if ((ret = wav_parse_bext_tag(s, size)) < 0)
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return ret;
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break;
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case MKTAG('L', 'I', 'S', 'T'):
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if (size < 4) {
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av_log(s, AV_LOG_ERROR, "too short LIST");
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return AVERROR_INVALIDDATA;
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}
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switch (avio_rl32(pb)) {
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case MKTAG('I', 'N', 'F', 'O'):
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if ((ret = ff_read_riff_info(s, size - 4)) < 0)
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return ret;
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}
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break;
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}
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/* seek to next tag unless we know that we'll run into EOF */
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if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
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avio_seek(pb, next_tag_ofs, SEEK_SET) < 0) {
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break;
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}
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}
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break_loop:
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if (data_ofs < 0) {
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av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
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return AVERROR_INVALIDDATA;
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}
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avio_seek(pb, data_ofs, SEEK_SET);
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if (!sample_count && st->codec->channels && av_get_bits_per_sample(st->codec->codec_id))
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sample_count = (data_size<<3) / (st->codec->channels * (uint64_t)av_get_bits_per_sample(st->codec->codec_id));
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if (sample_count)
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st->duration = sample_count;
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ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
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ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
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return 0;
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}
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/** Find chunk with w64 GUID by skipping over other chunks
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* @return the size of the found chunk
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*/
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static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
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{
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uint8_t guid[16];
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int64_t size;
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while (!pb->eof_reached) {
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avio_read(pb, guid, 16);
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size = avio_rl64(pb);
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if (size <= 24)
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return -1;
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if (!memcmp(guid, guid1, 16))
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return size;
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avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
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}
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return -1;
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}
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static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a',
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0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
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#define MAX_SIZE 4096
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static int wav_read_packet(AVFormatContext *s,
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AVPacket *pkt)
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{
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int ret, size;
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int64_t left;
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AVStream *st;
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WAVDemuxContext *wav = s->priv_data;
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st = s->streams[0];
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left = wav->data_end - avio_tell(s->pb);
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if (left <= 0){
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if (CONFIG_W64_DEMUXER && wav->w64)
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left = find_guid(s->pb, guid_data) - 24;
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else
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left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
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if (left < 0)
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return AVERROR_EOF;
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wav->data_end= avio_tell(s->pb) + left;
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}
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size = MAX_SIZE;
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if (st->codec->block_align > 1) {
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if (size < st->codec->block_align)
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size = st->codec->block_align;
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size = (size / st->codec->block_align) * st->codec->block_align;
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}
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size = FFMIN(size, left);
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ret = av_get_packet(s->pb, pkt, size);
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if (ret < 0)
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return ret;
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pkt->stream_index = 0;
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return ret;
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}
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static int wav_read_seek(AVFormatContext *s,
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int stream_index, int64_t timestamp, int flags)
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{
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AVStream *st;
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st = s->streams[0];
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switch (st->codec->codec_id) {
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case AV_CODEC_ID_MP2:
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case AV_CODEC_ID_MP3:
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case AV_CODEC_ID_AC3:
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case AV_CODEC_ID_DTS:
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/* use generic seeking with dynamically generated indexes */
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return -1;
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default:
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break;
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}
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return ff_pcm_read_seek(s, stream_index, timestamp, flags);
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}
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AVInputFormat ff_wav_demuxer = {
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.name = "wav",
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.long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
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.priv_data_size = sizeof(WAVDemuxContext),
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.read_probe = wav_probe,
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.read_header = wav_read_header,
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.read_packet = wav_read_packet,
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.read_seek = wav_read_seek,
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.flags = AVFMT_GENERIC_INDEX,
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.codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
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};
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#endif /* CONFIG_WAV_DEMUXER */
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#if CONFIG_W64_DEMUXER
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static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f',
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0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 };
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static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e',
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0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
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static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ',
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0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
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static int w64_probe(AVProbeData *p)
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{
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if (p->buf_size <= 40)
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return 0;
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if (!memcmp(p->buf, guid_riff, 16) &&
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!memcmp(p->buf + 24, guid_wave, 16))
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return AVPROBE_SCORE_MAX;
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else
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return 0;
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}
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static int w64_read_header(AVFormatContext *s)
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{
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int64_t size;
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AVIOContext *pb = s->pb;
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WAVDemuxContext *wav = s->priv_data;
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AVStream *st;
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uint8_t guid[16];
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int ret;
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avio_read(pb, guid, 16);
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if (memcmp(guid, guid_riff, 16))
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return -1;
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if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
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return -1;
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avio_read(pb, guid, 16);
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if (memcmp(guid, guid_wave, 16)) {
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av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
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return -1;
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}
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size = find_guid(pb, guid_fmt);
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if (size < 0) {
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av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
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return -1;
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}
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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/* subtract chunk header size - normal wav file doesn't count it */
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ret = ff_get_wav_header(pb, st->codec, size - 24);
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if (ret < 0)
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return ret;
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avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
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st->need_parsing = AVSTREAM_PARSE_FULL;
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avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
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|
|
size = find_guid(pb, guid_data);
|
|
if (size < 0) {
|
|
av_log(s, AV_LOG_ERROR, "could not find data guid\n");
|
|
return -1;
|
|
}
|
|
wav->data_end = avio_tell(pb) + size - 24;
|
|
wav->w64 = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_w64_demuxer = {
|
|
.name = "w64",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
|
|
.priv_data_size = sizeof(WAVDemuxContext),
|
|
.read_probe = w64_probe,
|
|
.read_header = w64_read_header,
|
|
.read_packet = wav_read_packet,
|
|
.read_seek = wav_read_seek,
|
|
.flags = AVFMT_GENERIC_INDEX,
|
|
.codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
|
|
};
|
|
#endif /* CONFIG_W64_DEMUXER */
|