[deb_ffmpeg.git] / ffmpeg / libavformat / qcp.c

/*
 * 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(!avio_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,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* QCP format (.qcp) demuxer
	3	* Copyright (c) 2009 Kenan Gillet
	4	*
	5	* This file is part of FFmpeg.
	6	*
	7	* FFmpeg is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU Lesser General Public
	9	* License as published by the Free Software Foundation; either
	10	* version 2.1 of the License, or (at your option) any later version.
	11	*
	12	* FFmpeg is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public
	18	* License along with FFmpeg; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	20	*/
	21
	22	/**
	23	* @file
	24	* QCP format (.qcp) demuxer
	25	* @author Kenan Gillet
	26	* @see RFC 3625: "The QCP File Format and Media Types for Speech Data"
	27	* http://tools.ietf.org/html/rfc3625
	28	*/
	29
	30	#include "libavutil/channel_layout.h"
	31	#include "libavutil/intreadwrite.h"
	32	#include "avformat.h"
	33
	34	typedef struct {
	35	uint32_t data_size; ///< size of data chunk
	36
	37	#define QCP_MAX_MODE 4
	38	int16_t rates_per_mode[QCP_MAX_MODE+1]; ///< contains the packet size corresponding
	39	///< to each mode, -1 if no size.
	40	} QCPContext;
	41
	42	/**
	43	* Last 15 out of 16 bytes of QCELP-13K GUID, as stored in the file;
	44	* the first byte of the GUID can be either 0x41 or 0x42.
	45	*/
	46	static const uint8_t guid_qcelp_13k_part[15] = {
	47	0x6d, 0x7f, 0x5e, 0x15, 0xb1, 0xd0, 0x11, 0xba,
	48	0x91, 0x00, 0x80, 0x5f, 0xb4, 0xb9, 0x7e
	49	};
	50
	51	/**
	52	* EVRC GUID as stored in the file
	53	*/
	54	static const uint8_t guid_evrc[16] = {
	55	0x8d, 0xd4, 0x89, 0xe6, 0x76, 0x90, 0xb5, 0x46,
	56	0x91, 0xef, 0x73, 0x6a, 0x51, 0x00, 0xce, 0xb4
	57	};
	58
	59	/**
	60	* SMV GUID as stored in the file
	61	*/
	62	static const uint8_t guid_smv[16] = {
	63	0x75, 0x2b, 0x7c, 0x8d, 0x97, 0xa7, 0x49, 0xed,
	64	0x98, 0x5e, 0xd5, 0x3c, 0x8c, 0xc7, 0x5f, 0x84
65	};
66
67	/**
68	* @param guid contains at least 16 bytes
69	* @return 1 if the guid is a qcelp_13k guid, 0 otherwise
70	*/
71	static int is_qcelp_13k_guid(const uint8_t *guid) {
72	return (guid[0] == 0x41 \|\| guid[0] == 0x42)
73	&& !memcmp(guid+1, guid_qcelp_13k_part, sizeof(guid_qcelp_13k_part));
74	}
75
76	static int qcp_probe(AVProbeData *pd)
77	{
78	if (AV_RL32(pd->buf ) == AV_RL32("RIFF") &&
79	AV_RL64(pd->buf+8) == AV_RL64("QLCMfmt "))
80	return AVPROBE_SCORE_MAX;
81	return 0;
82	}
83
84	static int qcp_read_header(AVFormatContext *s)
85	{
86	AVIOContext *pb = s->pb;
87	QCPContext *c = s->priv_data;
88	AVStream *st = avformat_new_stream(s, NULL);
89	uint8_t buf[16];
90	int i, nb_rates;
91
92	if (!st)
93	return AVERROR(ENOMEM);
94
95	avio_rb32(pb); // "RIFF"
96	avio_skip(pb, 4 + 8 + 4 + 1 + 1); // filesize + "QLCMfmt " + chunk-size + major-version + minor-version
97
98	st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
99	st->codec->channels = 1;
100	st->codec->channel_layout = AV_CH_LAYOUT_MONO;
101	avio_read(pb, buf, 16);
102	if (is_qcelp_13k_guid(buf)) {
103	st->codec->codec_id = AV_CODEC_ID_QCELP;
104	} else if (!memcmp(buf, guid_evrc, 16)) {
105	st->codec->codec_id = AV_CODEC_ID_EVRC;
106	} else if (!memcmp(buf, guid_smv, 16)) {
107	st->codec->codec_id = AV_CODEC_ID_SMV;
108	} else {
109	av_log(s, AV_LOG_ERROR, "Unknown codec GUID.\n");
110	return AVERROR_INVALIDDATA;
111	}
112	avio_skip(pb, 2 + 80); // codec-version + codec-name
113	st->codec->bit_rate = avio_rl16(pb);
114
115	s->packet_size = avio_rl16(pb);
116	avio_skip(pb, 2); // block-size
117	st->codec->sample_rate = avio_rl16(pb);
118	avio_skip(pb, 2); // sample-size
119
120	memset(c->rates_per_mode, -1, sizeof(c->rates_per_mode));
121	nb_rates = avio_rl32(pb);
122	nb_rates = FFMIN(nb_rates, 8);
123	for (i=0; i<nb_rates; i++) {
124	int size = avio_r8(pb);
125	int mode = avio_r8(pb);
126	if (mode > QCP_MAX_MODE) {
127	av_log(s, AV_LOG_WARNING, "Unknown entry %d=>%d in rate-map-table.\n ", mode, size);
128	} else
129	c->rates_per_mode[mode] = size;
130	}
131	avio_skip(pb, 16 - 2*nb_rates + 20); // empty entries of rate-map-table + reserved
132
133	return 0;
134	}
135
136	static int qcp_read_packet(AVFormatContext s, AVPacket pkt)
137	{
138	AVIOContext *pb = s->pb;
139	QCPContext *c = s->priv_data;
140	unsigned int chunk_size, tag;
141
142	while(!avio_feof(pb)) {
143	if (c->data_size) {
144	int pkt_size, ret, mode = avio_r8(pb);
145
146	if (s->packet_size) {
147	pkt_size = s->packet_size - 1;
148	} else if (mode > QCP_MAX_MODE \|\| (pkt_size = c->rates_per_mode[mode]) < 0) {
149	c->data_size--;
150	continue;
151	}
152
153	if (c->data_size <= pkt_size) {
154	av_log(s, AV_LOG_WARNING, "Data chunk is too small.\n");
155	pkt_size = c->data_size - 1;
156	}
157
158	if ((ret = av_get_packet(pb, pkt, pkt_size)) >= 0) {
159	if (pkt_size != ret)
160	av_log(s, AV_LOG_ERROR, "Packet size is too small.\n");
161
162	c->data_size -= pkt_size + 1;
163	}
164	return ret;
165	}
166
167	if (avio_tell(pb) & 1 && avio_r8(pb))
168	av_log(s, AV_LOG_WARNING, "Padding should be 0.\n");
169
170	tag = avio_rl32(pb);
171	chunk_size = avio_rl32(pb);
172	switch (tag) {
173	case MKTAG('v', 'r', 'a', 't'):
174	if (avio_rl32(pb)) // var-rate-flag
175	s->packet_size = 0;
176	avio_skip(pb, 4); // size-in-packets
177	break;
178	case MKTAG('d', 'a', 't', 'a'):
179	c->data_size = chunk_size;
180	break;
181
182	default:
183	avio_skip(pb, chunk_size);
184	}
185	}
186	return AVERROR_EOF;
187	}
188
189	AVInputFormat ff_qcp_demuxer = {
190	.name = "qcp",
191	.long_name = NULL_IF_CONFIG_SMALL("QCP"),
192	.priv_data_size = sizeof(QCPContext),
193	.read_probe = qcp_probe,
194	.read_header = qcp_read_header,
195	.read_packet = qcp_read_packet,
196	};