lavf: split wav muxer and demuxer into separate files.

1 files changed, 507 insertions, 0 deletions

diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c
new file mode 100644
index 0000000000..bc5288734e
--- /dev/null
+++ b/libavformat/wavdec.c
@@ -0,0 +1,507 @@
+/*
+ * WAV demuxer
+ * Copyright (c) 2001, 2002 Fabrice Bellard
+ *
+ * Sony Wave64 demuxer
+ * RF64 demuxer
+ * Copyright (c) 2009 Daniel Verkamp
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/avassert.h"
+#include "libavutil/dict.h"
+#include "libavutil/log.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+#include "avformat.h"
+#include "internal.h"
+#include "avio_internal.h"
+#include "pcm.h"
+#include "riff.h"
+#include "avio.h"
+#include "metadata.h"
+
+typedef struct WAVDemuxContext {
+    int64_t data_end;
+    int w64;
+} WAVDemuxContext;
+
+
+#if CONFIG_WAV_DEMUXER
+
+static int64_t next_tag(AVIOContext *pb, uint32_t *tag)
+{
+    *tag = avio_rl32(pb);
+    return avio_rl32(pb);
+}
+
+/* return the size of the found tag */
+static int64_t find_tag(AVIOContext *pb, uint32_t tag1)
+{
+    unsigned int tag;
+    int64_t size;
+
+    for (;;) {
+        if (pb->eof_reached)
+            return -1;
+        size = next_tag(pb, &tag);
+        if (tag == tag1)
+            break;
+        avio_skip(pb, size);
+    }
+    return size;
+}
+
+static int wav_probe(AVProbeData *p)
+{
+    /* check file header */
+    if (p->buf_size <= 32)
+        return 0;
+    if (!memcmp(p->buf + 8, "WAVE", 4)) {
+        if (!memcmp(p->buf, "RIFF", 4))
+            /*
+              Since ACT demuxer has standard WAV header at top of it's own,
+              returning score is decreased to avoid probe conflict
+              between ACT and WAV.
+            */
+            return AVPROBE_SCORE_MAX - 1;
+        else if (!memcmp(p->buf,      "RF64", 4) &&
+                 !memcmp(p->buf + 12, "ds64", 4))
+            return AVPROBE_SCORE_MAX;
+    }
+    return 0;
+}
+
+static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
+{
+    AVIOContext *pb = s->pb;
+    int ret;
+
+    /* parse fmt header */
+    *st = avformat_new_stream(s, NULL);
+    if (!*st)
+        return AVERROR(ENOMEM);
+
+    ret = ff_get_wav_header(pb, (*st)->codec, size);
+    if (ret < 0)
+        return ret;
+    (*st)->need_parsing = AVSTREAM_PARSE_FULL;
+
+    avpriv_set_pts_info(*st, 64, 1, (*st)->codec->sample_rate);
+
+    return 0;
+}
+
+static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
+                                        int length)
+{
+    char temp[257];
+    int ret;
+
+    av_assert0(length <= sizeof(temp));
+    if ((ret = avio_read(s->pb, temp, length)) < 0)
+        return ret;
+
+    temp[length] = 0;
+
+    if (strlen(temp))
+        return av_dict_set(&s->metadata, key, temp, 0);
+
+    return 0;
+}
+
+static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
+{
+    char temp[131], *coding_history;
+    int ret, x;
+    uint64_t time_reference;
+    int64_t umid_parts[8], umid_mask = 0;
+
+    if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
+        (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
+        (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
+        (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
+        (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
+        return ret;
+
+    time_reference = avio_rl64(s->pb);
+    snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
+    if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
+        return ret;
+
+    /* check if version is >= 1, in which case an UMID may be present */
+    if (avio_rl16(s->pb) >= 1) {
+        for (x = 0; x < 8; x++)
+            umid_mask |= umid_parts[x] = avio_rb64(s->pb);
+
+        if (umid_mask) {
+            /* the string formatting below is per SMPTE 330M-2004 Annex C */
+            if (umid_parts[4] == 0 && umid_parts[5] == 0 && umid_parts[6] == 0 && umid_parts[7] == 0) {
+                /* basic UMID */
+                snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
+                         umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3]);
+            } else {
+                /* extended UMID */
+                snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
+                                             "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
+                         umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3],
+                         umid_parts[4], umid_parts[5], umid_parts[6], umid_parts[7]);
+            }
+
+            if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
+                return ret;
+        }
+
+        avio_skip(s->pb, 190);
+    } else
+        avio_skip(s->pb, 254);
+
+    if (size > 602) {
+        /* CodingHistory present */
+        size -= 602;
+
+        if (!(coding_history = av_malloc(size+1)))
+            return AVERROR(ENOMEM);
+
+        if ((ret = avio_read(s->pb, coding_history, size)) < 0)
+            return ret;
+
+        coding_history[size] = 0;
+        if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
+                               AV_DICT_DONT_STRDUP_VAL)) < 0)
+            return ret;
+    }
+
+    return 0;
+}
+
+static const AVMetadataConv wav_metadata_conv[] = {
+    {"description",      "comment"      },
+    {"originator",       "encoded_by"   },
+    {"origination_date", "date"         },
+    {"origination_time", "creation_time"},
+    {0},
+};
+
+/* wav input */
+static int wav_read_header(AVFormatContext *s)
+{
+    int64_t size, av_uninit(data_size);
+    int64_t sample_count=0;
+    int rf64;
+    uint32_t tag, list_type;
+    AVIOContext *pb = s->pb;
+    AVStream *st = NULL;
+    WAVDemuxContext *wav = s->priv_data;
+    int ret, got_fmt = 0;
+    int64_t next_tag_ofs, data_ofs = -1;
+
+    /* check RIFF header */
+    tag = avio_rl32(pb);
+
+    rf64 = tag == MKTAG('R', 'F', '6', '4');
+    if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F'))
+        return -1;
+    avio_rl32(pb); /* file size */
+    tag = avio_rl32(pb);
+    if (tag != MKTAG('W', 'A', 'V', 'E'))
+        return -1;
+
+    if (rf64) {
+        if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
+            return -1;
+        size = avio_rl32(pb);
+        if (size < 16)
+            return -1;
+        avio_rl64(pb); /* RIFF size */
+        data_size = avio_rl64(pb);
+        sample_count = avio_rl64(pb);
+        if (data_size < 0 || sample_count < 0) {
+            av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
+                   "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
+                   data_size, sample_count);
+            return AVERROR_INVALIDDATA;
+        }
+        avio_skip(pb, size - 16); /* skip rest of ds64 chunk */
+    }
+
+    for (;;) {
+        size = next_tag(pb, &tag);
+        next_tag_ofs = avio_tell(pb) + size;
+
+        if (pb->eof_reached)
+            break;
+
+        switch (tag) {
+        case MKTAG('f', 'm', 't', ' '):
+            /* only parse the first 'fmt ' tag found */
+            if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st) < 0)) {
+                return ret;
+            } else if (got_fmt)
+                av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
+
+            got_fmt = 1;
+            break;
+        case MKTAG('d', 'a', 't', 'a'):
+            if (!got_fmt) {
+                av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'data' tag\n");
+                return AVERROR_INVALIDDATA;
+            }
+
+            if (rf64) {
+                next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
+            } else {
+                data_size = size;
+                next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
+            }
+
+            data_ofs = avio_tell(pb);
+
+            /* don't look for footer metadata if we can't seek or if we don't
+             * know where the data tag ends
+             */
+            if (!pb->seekable || (!rf64 && !size))
+                goto break_loop;
+            break;
+        case MKTAG('f','a','c','t'):
+            if (!sample_count)
+                sample_count = avio_rl32(pb);
+            break;
+        case MKTAG('b','e','x','t'):
+            if ((ret = wav_parse_bext_tag(s, size)) < 0)
+                return ret;
+            break;
+        case MKTAG('L', 'I', 'S', 'T'):
+            list_type = avio_rl32(pb);
+            if (size <= 4) {
+                av_log(s, AV_LOG_ERROR, "too short LIST");
+                return AVERROR_INVALIDDATA;
+            }
+            switch (list_type) {
+            case MKTAG('I', 'N', 'F', 'O'):
+                if ((ret = ff_read_riff_info(s, size - 4)) < 0)
+                    return ret;
+            }
+            break;
+        }
+
+        /* seek to next tag unless we know that we'll run into EOF */
+        if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
+            avio_seek(pb, next_tag_ofs, SEEK_SET) < 0) {
+            break;
+        }
+    }
+break_loop:
+    if (data_ofs < 0) {
+        av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    avio_seek(pb, data_ofs, SEEK_SET);
+
+    if (!sample_count && st->codec->channels && av_get_bits_per_sample(st->codec->codec_id))
+        sample_count = (data_size<<3) / (st->codec->channels * (uint64_t)av_get_bits_per_sample(st->codec->codec_id));
+    if (sample_count)
+        st->duration = sample_count;
+
+    ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
+    ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
+
+    return 0;
+}
+
+/** Find chunk with w64 GUID by skipping over other chunks
+ * @return the size of the found chunk
+ */
+static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
+{
+    uint8_t guid[16];
+    int64_t size;
+
+    while (!pb->eof_reached) {
+        avio_read(pb, guid, 16);
+        size = avio_rl64(pb);
+        if (size <= 24)
+            return -1;
+        if (!memcmp(guid, guid1, 16))
+            return size;
+        avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
+    }
+    return -1;
+}
+
+static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a',
+    0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
+
+#define MAX_SIZE 4096
+
+static int wav_read_packet(AVFormatContext *s,
+                           AVPacket *pkt)
+{
+    int ret, size;
+    int64_t left;
+    AVStream *st;
+    WAVDemuxContext *wav = s->priv_data;
+
+    st = s->streams[0];
+
+    left = wav->data_end - avio_tell(s->pb);
+    if (left <= 0){
+        if (CONFIG_W64_DEMUXER && wav->w64)
+            left = find_guid(s->pb, guid_data) - 24;
+        else
+            left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
+        if (left < 0)
+            return AVERROR_EOF;
+        wav->data_end= avio_tell(s->pb) + left;
+    }
+
+    size = MAX_SIZE;
+    if (st->codec->block_align > 1) {
+        if (size < st->codec->block_align)
+            size = st->codec->block_align;
+        size = (size / st->codec->block_align) * st->codec->block_align;
+    }
+    size = FFMIN(size, left);
+    ret  = av_get_packet(s->pb, pkt, size);
+    if (ret < 0)
+        return ret;
+    pkt->stream_index = 0;
+
+    return ret;
+}
+
+static int wav_read_seek(AVFormatContext *s,
+                         int stream_index, int64_t timestamp, int flags)
+{
+    AVStream *st;
+
+    st = s->streams[0];
+    switch (st->codec->codec_id) {
+    case AV_CODEC_ID_MP2:
+    case AV_CODEC_ID_MP3:
+    case AV_CODEC_ID_AC3:
+    case AV_CODEC_ID_DTS:
+        /* use generic seeking with dynamically generated indexes */
+        return -1;
+    default:
+        break;
+    }
+    return ff_pcm_read_seek(s, stream_index, timestamp, flags);
+}
+
+AVInputFormat ff_wav_demuxer = {
+    .name           = "wav",
+    .long_name      = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
+    .priv_data_size = sizeof(WAVDemuxContext),
+    .read_probe     = wav_probe,
+    .read_header    = wav_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_WAV_DEMUXER */
+
+
+#if CONFIG_W64_DEMUXER
+static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f',
+    0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 };
+
+static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e',
+    0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
+
+static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ',
+    0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
+
+static int w64_probe(AVProbeData *p)
+{
+    if (p->buf_size <= 40)
+        return 0;
+    if (!memcmp(p->buf,      guid_riff, 16) &&
+        !memcmp(p->buf + 24, guid_wave, 16))
+        return AVPROBE_SCORE_MAX;
+    else
+        return 0;
+}
+
+static int w64_read_header(AVFormatContext *s)
+{
+    int64_t size;
+    AVIOContext *pb  = s->pb;
+    WAVDemuxContext    *wav = s->priv_data;
+    AVStream *st;
+    uint8_t guid[16];
+    int ret;
+
+    avio_read(pb, guid, 16);
+    if (memcmp(guid, guid_riff, 16))
+        return -1;
+
+    if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
+        return -1;
+
+    avio_read(pb, guid, 16);
+    if (memcmp(guid, guid_wave, 16)) {
+        av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
+        return -1;
+    }
+
+    size = find_guid(pb, guid_fmt);
+    if (size < 0) {
+        av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
+        return -1;
+    }
+
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    /* subtract chunk header size - normal wav file doesn't count it */
+    ret = ff_get_wav_header(pb, st->codec, size - 24);
+    if (ret < 0)
+        return ret;
+    avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
+
+    st->need_parsing = AVSTREAM_PARSE_FULL;
+
+    avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
+
+    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 */