lavf: rename oma.c -> omadec.c

1 files changed, 0 insertions, 464 deletions

diff --git a/libavformat/oma.c b/libavformat/oma.c
deleted file mode 100644
index 1aa9a25477..0000000000
--- a/libavformat/oma.c
+++ /dev/null
@@ -1,464 +0,0 @@
-/*
- * Sony OpenMG (OMA) demuxer
- *
- * Copyright (c) 2008 Maxim Poliakovski
- *               2008 Benjamin Larsson
- *               2011 David Goldwich
- *
- * 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
- */
-
-/**
- * @file
- * This is a demuxer for Sony OpenMG Music files
- *
- * Known file extensions: ".oma", "aa3"
- * The format of such files consists of three parts:
- * - "ea3" header carrying overall info and metadata. Except for starting with
- *   "ea" instead of "ID", it's an ID3v2 header.
- * - "EA3" header is a Sony-specific header containing information about
- *   the OpenMG file: codec type (usually ATRAC, can also be MP3 or WMA),
- *   codec specific info (packet size, sample rate, channels and so on)
- *   and DRM related info (file encryption, content id).
- * - Sound data organized in packets follow the EA3 header
- *   (can be encrypted using the Sony DRM!).
- *
- * CODEC SUPPORT: Only ATRAC3 codec is currently supported!
- */
-
-#include "avformat.h"
-#include "internal.h"
-#include "libavutil/intreadwrite.h"
-#include "libavutil/des.h"
-#include "pcm.h"
-#include "riff.h"
-#include "id3v2.h"
-
-#define EA3_HEADER_SIZE 96
-#define ID3v2_EA3_MAGIC "ea3"
-#define OMA_ENC_HEADER_SIZE 16
-
-enum {
-    OMA_CODECID_ATRAC3  = 0,
-    OMA_CODECID_ATRAC3P = 1,
-    OMA_CODECID_MP3     = 3,
-    OMA_CODECID_LPCM    = 4,
-    OMA_CODECID_WMA     = 5,
-};
-
-static const AVCodecTag codec_oma_tags[] = {
-    { CODEC_ID_ATRAC3,      OMA_CODECID_ATRAC3 },
-    { CODEC_ID_ATRAC3P,     OMA_CODECID_ATRAC3P },
-    { CODEC_ID_MP3,         OMA_CODECID_MP3 },
-    { CODEC_ID_PCM_S16BE,   OMA_CODECID_LPCM },
-};
-
-static const uint64_t leaf_table[] = {
-    0xd79e8283acea4620, 0x7a9762f445afd0d8,
-    0x354d60a60b8c79f1, 0x584e1cde00b07aee,
-    0x1573cd93da7df623, 0x47f98d79620dd535
-};
-
-typedef struct OMAContext {
-    uint64_t content_start;
-    int encrypted;
-    uint16_t k_size;
-    uint16_t e_size;
-    uint16_t i_size;
-    uint16_t s_size;
-    uint32_t rid;
-    uint8_t r_val[24];
-    uint8_t n_val[24];
-    uint8_t m_val[8];
-    uint8_t s_val[8];
-    uint8_t sm_val[8];
-    uint8_t e_val[8];
-    uint8_t iv[8];
-    struct AVDES av_des;
-} OMAContext;
-
-static void hex_log(AVFormatContext *s, int level, const char *name, const uint8_t *value, int len)
-{
-    char buf[33];
-    len = FFMIN(len, 16);
-    if (av_log_get_level() < level)
-        return;
-    ff_data_to_hex(buf, value, len, 1);
-    buf[len<<1] = '\0';
-    av_log(s, level, "%s: %s\n", name, buf);
-}
-
-static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
-{
-    OMAContext *oc = s->priv_data;
-
-    if (!r_val && !n_val)
-        return -1;
-
-    len = FFMIN(len, 16);
-
-    /* use first 64 bits in the third round again */
-    if (r_val) {
-        if (r_val != oc->r_val) {
-            memset(oc->r_val, 0, 24);
-            memcpy(oc->r_val, r_val, len);
-        }
-        memcpy(&oc->r_val[16], r_val, 8);
-    }
-    if (n_val) {
-        if (n_val != oc->n_val) {
-            memset(oc->n_val, 0, 24);
-            memcpy(oc->n_val, n_val, len);
-        }
-        memcpy(&oc->n_val[16], n_val, 8);
-    }
-
-    return 0;
-}
-
-static int rprobe(AVFormatContext *s, uint8_t *enc_header, const uint8_t *r_val)
-{
-    OMAContext *oc = s->priv_data;
-    unsigned int pos;
-    struct AVDES av_des;
-
-    if (!enc_header || !r_val)
-        return -1;
-
-    /* m_val */
-    av_des_init(&av_des, r_val, 192, 1);
-    av_des_crypt(&av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
-
-    /* s_val */
-    av_des_init(&av_des, oc->m_val, 64, 0);
-    av_des_crypt(&av_des, oc->s_val, NULL, 1, NULL, 0);
-
-    /* sm_val */
-    pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
-    av_des_init(&av_des, oc->s_val, 64, 0);
-    av_des_mac(&av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
-
-    pos += oc->i_size;
-
-    return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
-}
-
-static int nprobe(AVFormatContext *s, uint8_t *enc_header, const uint8_t *n_val)
-{
-    OMAContext *oc = s->priv_data;
-    uint32_t pos, taglen, datalen;
-    struct AVDES av_des;
-
-    if (!enc_header || !n_val)
-        return -1;
-
-    pos = OMA_ENC_HEADER_SIZE + oc->k_size;
-    if (!memcmp(&enc_header[pos], "EKB ", 4))
-        pos += 32;
-
-    if (AV_RB32(&enc_header[pos]) != oc->rid)
-        av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
-
-    taglen = AV_RB32(&enc_header[pos+32]);
-    datalen = AV_RB32(&enc_header[pos+36]) >> 4;
-
-    pos += 44 + taglen;
-
-    av_des_init(&av_des, n_val, 192, 1);
-    while (datalen-- > 0) {
-        av_des_crypt(&av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
-        kset(s, oc->r_val, NULL, 16);
-        if (!rprobe(s, enc_header, oc->r_val))
-            return 0;
-        pos += 16;
-    }
-
-    return -1;
-}
-
-static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
-{
-    OMAContext *oc = s->priv_data;
-    ID3v2ExtraMetaGEOB *geob = NULL;
-    uint8_t *gdata;
-
-    oc->encrypted = 1;
-    av_log(s, AV_LOG_INFO, "File is encrypted\n");
-
-    /* find GEOB metadata */
-    while (em) {
-        if (!strcmp(em->tag, "GEOB") &&
-            (geob = em->data) &&
-            (!strcmp(geob->description, "OMG_LSI") ||
-             !strcmp(geob->description, "OMG_BKLSI"))) {
-            break;
-        }
-        em = em->next;
-    }
-    if (!em) {
-        av_log(s, AV_LOG_ERROR, "No encryption header found\n");
-        return -1;
-    }
-
-    if (geob->datasize < 64) {
-        av_log(s, AV_LOG_ERROR, "Invalid GEOB data size: %u\n", geob->datasize);
-        return -1;
-    }
-
-    gdata = geob->data;
-
-    if (AV_RB16(gdata) != 1)
-        av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
-
-    oc->k_size = AV_RB16(&gdata[2]);
-    oc->e_size = AV_RB16(&gdata[4]);
-    oc->i_size = AV_RB16(&gdata[6]);
-    oc->s_size = AV_RB16(&gdata[8]);
-
-    if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING     ", 12)) {
-        av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
-        return -1;
-    }
-    oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
-    av_log(s, AV_LOG_DEBUG, "RID: %.8x\n", oc->rid);
-
-    memcpy(oc->iv, &header[0x58], 8);
-    hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
-
-    hex_log(s, AV_LOG_DEBUG, "CBC-MAC", &gdata[OMA_ENC_HEADER_SIZE+oc->k_size+oc->e_size+oc->i_size], 8);
-
-    if (s->keylen > 0) {
-        kset(s, s->key, s->key, s->keylen);
-    }
-    if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
-        rprobe(s, gdata, oc->r_val) < 0 &&
-        nprobe(s, gdata, oc->n_val) < 0) {
-        int i;
-        for (i = 0; i < sizeof(leaf_table); i += 2) {
-            uint8_t buf[16];
-            AV_WL64(buf, leaf_table[i]);
-            AV_WL64(&buf[8], leaf_table[i+1]);
-            kset(s, buf, buf, 16);
-            if (!rprobe(s, gdata, oc->r_val) || !nprobe(s, gdata, oc->n_val))
-                break;
-        }
-        if (i >= sizeof(leaf_table)) {
-            av_log(s, AV_LOG_ERROR, "Invalid key\n");
-            return -1;
-        }
-    }
-
-    /* e_val */
-    av_des_init(&oc->av_des, oc->m_val, 64, 0);
-    av_des_crypt(&oc->av_des, oc->e_val, &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
-    hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
-
-    /* init e_val */
-    av_des_init(&oc->av_des, oc->e_val, 64, 1);
-
-    return 0;
-}
-
-static int oma_read_header(AVFormatContext *s,
-                           AVFormatParameters *ap)
-{
-    static const uint16_t srate_tab[6] = {320,441,480,882,960,0};
-    int     ret, framesize, jsflag, samplerate;
-    uint32_t codec_params;
-    int16_t eid;
-    uint8_t buf[EA3_HEADER_SIZE];
-    uint8_t *edata;
-    AVStream *st;
-    ID3v2ExtraMeta *extra_meta = NULL;
-    OMAContext *oc = s->priv_data;
-
-    ff_id3v2_read_all(s, ID3v2_EA3_MAGIC, &extra_meta);
-    ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
-    if (ret < EA3_HEADER_SIZE)
-        return -1;
-
-    if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}),3) || buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
-        av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
-        return -1;
-    }
-
-    oc->content_start = avio_tell(s->pb);
-
-    /* encrypted file */
-    eid = AV_RB16(&buf[6]);
-    if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
-        ff_id3v2_free_extra_meta(&extra_meta);
-        return -1;
-    }
-
-    ff_id3v2_free_extra_meta(&extra_meta);
-
-    codec_params = AV_RB24(&buf[33]);
-
-    st = avformat_new_stream(s, NULL);
-    if (!st)
-        return AVERROR(ENOMEM);
-
-    st->start_time = 0;
-    st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
-    st->codec->codec_tag   = buf[32];
-    st->codec->codec_id    = ff_codec_get_id(codec_oma_tags, st->codec->codec_tag);
-
-    switch (buf[32]) {
-        case OMA_CODECID_ATRAC3:
-            samplerate = srate_tab[(codec_params >> 13) & 7]*100;
-            if (samplerate != 44100)
-                av_log_ask_for_sample(s, "Unsupported sample rate: %d\n",
-                                      samplerate);
-
-            framesize = (codec_params & 0x3FF) * 8;
-            jsflag = (codec_params >> 17) & 1; /* get stereo coding mode, 1 for joint-stereo */
-            st->codec->channels    = 2;
-            st->codec->sample_rate = samplerate;
-            st->codec->bit_rate    = st->codec->sample_rate * framesize * 8 / 1024;
-
-            /* fake the atrac3 extradata (wav format, makes stream copy to wav work) */
-            st->codec->extradata_size = 14;
-            edata = av_mallocz(14 + FF_INPUT_BUFFER_PADDING_SIZE);
-            if (!edata)
-                return AVERROR(ENOMEM);
-
-            st->codec->extradata = edata;
-            AV_WL16(&edata[0],  1);             // always 1
-            AV_WL32(&edata[2],  samplerate);    // samples rate
-            AV_WL16(&edata[6],  jsflag);        // coding mode
-            AV_WL16(&edata[8],  jsflag);        // coding mode
-            AV_WL16(&edata[10], 1);             // always 1
-            // AV_WL16(&edata[12], 0);          // always 0
-
-            avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
-            break;
-        case OMA_CODECID_ATRAC3P:
-            st->codec->channels = (codec_params >> 10) & 7;
-            framesize = ((codec_params & 0x3FF) * 8) + 8;
-            st->codec->sample_rate = srate_tab[(codec_params >> 13) & 7]*100;
-            st->codec->bit_rate    = st->codec->sample_rate * framesize * 8 / 1024;
-            avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
-            av_log(s, AV_LOG_ERROR, "Unsupported codec ATRAC3+!\n");
-            break;
-        case OMA_CODECID_MP3:
-            st->need_parsing = AVSTREAM_PARSE_FULL;
-            framesize = 1024;
-            break;
-        case OMA_CODECID_LPCM:
-            /* PCM 44.1 kHz 16 bit stereo big-endian */
-            st->codec->channels = 2;
-            st->codec->sample_rate = 44100;
-            framesize = 1024;
-            /* bit rate = sample rate x PCM block align (= 4) x 8 */
-            st->codec->bit_rate = st->codec->sample_rate * 32;
-            st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
-            avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
-            break;
-        default:
-            av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n",buf[32]);
-            return -1;
-    }
-
-    st->codec->block_align = framesize;
-
-    return 0;
-}
-
-
-static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
-    OMAContext *oc = s->priv_data;
-    int packet_size = s->streams[0]->codec->block_align;
-    int ret = av_get_packet(s->pb, pkt, packet_size);
-
-    if (ret <= 0)
-        return AVERROR(EIO);
-
-    pkt->stream_index = 0;
-
-    if (oc->encrypted) {
-        /* previous unencrypted block saved in IV for the next packet (CBC mode) */
-        av_des_crypt(&oc->av_des, pkt->data, pkt->data, (packet_size >> 3), oc->iv, 1);
-    }
-
-    return ret;
-}
-
-static int oma_read_probe(AVProbeData *p)
-{
-    const uint8_t *buf;
-    unsigned tag_len = 0;
-
-    buf = p->buf;
-
-    if (p->buf_size < ID3v2_HEADER_SIZE ||
-        !ff_id3v2_match(buf, ID3v2_EA3_MAGIC) ||
-        buf[3] != 3 || // version must be 3
-        buf[4]) // flags byte zero
-        return 0;
-
-    tag_len = ff_id3v2_tag_len(buf);
-
-    /* This check cannot overflow as tag_len has at most 28 bits */
-    if (p->buf_size < tag_len + 5)
-        /* EA3 header comes late, might be outside of the probe buffer */
-        return AVPROBE_SCORE_MAX / 2;
-
-    buf += tag_len;
-
-    if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
-        return AVPROBE_SCORE_MAX;
-    else
-        return 0;
-}
-
-static int oma_read_seek(struct AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
-{
-    OMAContext *oc = s->priv_data;
-
-    pcm_read_seek(s, stream_index, timestamp, flags);
-
-    if (oc->encrypted) {
-        /* readjust IV for CBC */
-        int64_t pos = avio_tell(s->pb);
-        if (pos < oc->content_start)
-            memset(oc->iv, 0, 8);
-        else {
-            if (avio_seek(s->pb, -8, SEEK_CUR) < 0 || avio_read(s->pb, oc->iv, 8) < 8) {
-                memset(oc->iv, 0, 8);
-                return -1;
-            }
-        }
-    }
-
-    return 0;
-}
-
-AVInputFormat ff_oma_demuxer = {
-    .name           = "oma",
-    .long_name      = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
-    .priv_data_size = sizeof(OMAContext),
-    .read_probe     = oma_read_probe,
-    .read_header    = oma_read_header,
-    .read_packet    = oma_read_packet,
-    .read_seek      = oma_read_seek,
-    .flags          = AVFMT_GENERIC_INDEX,
-    .extensions     = "oma,omg,aa3",
-    .codec_tag      = (const AVCodecTag* const []){codec_oma_tags, 0},
-};
-