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Diffstat (limited to 'ffmpeg1/libavformat/qcp.c')
| -rw-r--r-- | ffmpeg1/libavformat/qcp.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/ffmpeg1/libavformat/qcp.c b/ffmpeg1/libavformat/qcp.c deleted file mode 100644 index 1ef86fe..0000000 --- a/ffmpeg1/libavformat/qcp.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - * QCP format (.qcp) demuxer - * Copyright (c) 2009 Kenan Gillet - * - * 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 - */ - -/** - * @file - * QCP format (.qcp) demuxer - * @author Kenan Gillet - * @see RFC 3625: "The QCP File Format and Media Types for Speech Data" - * http://tools.ietf.org/html/rfc3625 - */ - -#include "libavutil/channel_layout.h" -#include "libavutil/intreadwrite.h" -#include "avformat.h" - -typedef struct { - uint32_t data_size; ///< size of data chunk - -#define QCP_MAX_MODE 4 - int16_t rates_per_mode[QCP_MAX_MODE+1]; ///< contains the packet size corresponding - ///< to each mode, -1 if no size. -} QCPContext; - -/** - * Last 15 out of 16 bytes of QCELP-13K GUID, as stored in the file; - * the first byte of the GUID can be either 0x41 or 0x42. - */ -static const uint8_t guid_qcelp_13k_part[15] = { - 0x6d, 0x7f, 0x5e, 0x15, 0xb1, 0xd0, 0x11, 0xba, - 0x91, 0x00, 0x80, 0x5f, 0xb4, 0xb9, 0x7e -}; - -/** - * EVRC GUID as stored in the file - */ -static const uint8_t guid_evrc[16] = { - 0x8d, 0xd4, 0x89, 0xe6, 0x76, 0x90, 0xb5, 0x46, - 0x91, 0xef, 0x73, 0x6a, 0x51, 0x00, 0xce, 0xb4 -}; - -/** - * SMV GUID as stored in the file - */ -static const uint8_t guid_smv[16] = { - 0x75, 0x2b, 0x7c, 0x8d, 0x97, 0xa7, 0x49, 0xed, - 0x98, 0x5e, 0xd5, 0x3c, 0x8c, 0xc7, 0x5f, 0x84 -}; - -/** - * @param guid contains at least 16 bytes - * @return 1 if the guid is a qcelp_13k guid, 0 otherwise - */ -static int is_qcelp_13k_guid(const uint8_t *guid) { - return (guid[0] == 0x41 || guid[0] == 0x42) - && !memcmp(guid+1, guid_qcelp_13k_part, sizeof(guid_qcelp_13k_part)); -} - -static int qcp_probe(AVProbeData *pd) -{ - if (AV_RL32(pd->buf ) == AV_RL32("RIFF") && - AV_RL64(pd->buf+8) == AV_RL64("QLCMfmt ")) - return AVPROBE_SCORE_MAX; - return 0; -} - -static int qcp_read_header(AVFormatContext *s) -{ - AVIOContext *pb = s->pb; - QCPContext *c = s->priv_data; - AVStream *st = avformat_new_stream(s, NULL); - uint8_t buf[16]; - int i, nb_rates; - - if (!st) - return AVERROR(ENOMEM); - - avio_rb32(pb); // "RIFF" - avio_skip(pb, 4 + 8 + 4 + 1 + 1); // filesize + "QLCMfmt " + chunk-size + major-version + minor-version - - st->codec->codec_type = AVMEDIA_TYPE_AUDIO; - st->codec->channels = 1; - st->codec->channel_layout = AV_CH_LAYOUT_MONO; - avio_read(pb, buf, 16); - if (is_qcelp_13k_guid(buf)) { - st->codec->codec_id = AV_CODEC_ID_QCELP; - } else if (!memcmp(buf, guid_evrc, 16)) { - st->codec->codec_id = AV_CODEC_ID_EVRC; - } else if (!memcmp(buf, guid_smv, 16)) { - st->codec->codec_id = AV_CODEC_ID_SMV; - } else { - av_log(s, AV_LOG_ERROR, "Unknown codec GUID.\n"); - return AVERROR_INVALIDDATA; - } - avio_skip(pb, 2 + 80); // codec-version + codec-name - st->codec->bit_rate = avio_rl16(pb); - - s->packet_size = avio_rl16(pb); - avio_skip(pb, 2); // block-size - st->codec->sample_rate = avio_rl16(pb); - avio_skip(pb, 2); // sample-size - - memset(c->rates_per_mode, -1, sizeof(c->rates_per_mode)); - nb_rates = avio_rl32(pb); - nb_rates = FFMIN(nb_rates, 8); - for (i=0; i<nb_rates; i++) { - int size = avio_r8(pb); - int mode = avio_r8(pb); - if (mode > QCP_MAX_MODE) { - av_log(s, AV_LOG_WARNING, "Unknown entry %d=>%d in rate-map-table.\n ", mode, size); - } else - c->rates_per_mode[mode] = size; - } - avio_skip(pb, 16 - 2*nb_rates + 20); // empty entries of rate-map-table + reserved - - return 0; -} - -static int qcp_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - AVIOContext *pb = s->pb; - QCPContext *c = s->priv_data; - unsigned int chunk_size, tag; - - while(!url_feof(pb)) { - if (c->data_size) { - int pkt_size, ret, mode = avio_r8(pb); - - if (s->packet_size) { - pkt_size = s->packet_size - 1; - } else if (mode > QCP_MAX_MODE || (pkt_size = c->rates_per_mode[mode]) < 0) { - c->data_size--; - continue; - } - - if (c->data_size <= pkt_size) { - av_log(s, AV_LOG_WARNING, "Data chunk is too small.\n"); - pkt_size = c->data_size - 1; - } - - if ((ret = av_get_packet(pb, pkt, pkt_size)) >= 0) { - if (pkt_size != ret) - av_log(s, AV_LOG_ERROR, "Packet size is too small.\n"); - - c->data_size -= pkt_size + 1; - } - return ret; - } - - if (avio_tell(pb) & 1 && avio_r8(pb)) - av_log(s, AV_LOG_WARNING, "Padding should be 0.\n"); - - tag = avio_rl32(pb); - chunk_size = avio_rl32(pb); - switch (tag) { - case MKTAG('v', 'r', 'a', 't'): - if (avio_rl32(pb)) // var-rate-flag - s->packet_size = 0; - avio_skip(pb, 4); // size-in-packets - break; - case MKTAG('d', 'a', 't', 'a'): - c->data_size = chunk_size; - break; - - default: - avio_skip(pb, chunk_size); - } - } - return AVERROR_EOF; -} - -AVInputFormat ff_qcp_demuxer = { - .name = "qcp", - .long_name = NULL_IF_CONFIG_SMALL("QCP"), - .priv_data_size = sizeof(QCPContext), - .read_probe = qcp_probe, - .read_header = qcp_read_header, - .read_packet = qcp_read_packet, -}; |