[libav.git] / libavformat / avienc.c

/*
 * AVI encoder.
 * Copyright (c) 2000 Fabrice Bellard.
 *
 * This library 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 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include "avformat.h"
#include "avi.h"

/*
 * TODO: 
 *  - fill all fields if non streamed (nb_frames for example)
 */

typedef struct AVIIndex {
    unsigned char tag[4];
    unsigned int flags, pos, len;
    struct AVIIndex *next;
} AVIIndex;

typedef struct {
    offset_t movi_list, frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
    int audio_strm_length[MAX_STREAMS];
    AVIIndex *first, *last;
} AVIContext;

offset_t start_tag(ByteIOContext *pb, const char *tag)
{
    put_tag(pb, tag);
    put_le32(pb, 0);
    return url_ftell(pb);
}

void end_tag(ByteIOContext *pb, offset_t start)
{
    offset_t pos;

    pos = url_ftell(pb);
    url_fseek(pb, start - 4, SEEK_SET);
    put_le32(pb, (UINT32)(pos - start));
    url_fseek(pb, pos, SEEK_SET);
}

/* Note: when encoding, the first matching tag is used, so order is
   important if multiple tags possible for a given codec. */
const CodecTag codec_bmp_tags[] = {
    { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
    { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
    { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X'), .invalid_asf = 1 },
    { CODEC_ID_MPEG4, MKTAG('d', 'i', 'v', 'x'), .invalid_asf = 1 },
    { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0'), .invalid_asf = 1 },
    { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D'), .invalid_asf = 1 },
    { CODEC_ID_MPEG4, MKTAG('x', 'v', 'i', 'd'), .invalid_asf = 1 },
    { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 's'), .invalid_asf = 1 },
    { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
    { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
    { CODEC_ID_MPEG4, MKTAG('m', '4', 's', '2') },
    { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3'), .invalid_asf = 1 }, /* default signature when using MSMPEG4 */
    { CODEC_ID_MSMPEG4V3, MKTAG('d', 'i', 'v', '3'), .invalid_asf = 1 },
    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') }, 
    { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') }, 
    { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') }, 
    { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') }, 
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') }, 
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') }, 
    { CODEC_ID_DVVIDEO, MKTAG('D', 'V', 'S', 'D') }, 
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') }, 
    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') }, 
    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') }, 
    { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') }, 
    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
    { CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
    { CODEC_ID_HUFFYUV, MKTAG('h', 'f', 'y', 'u') },
    { 0, 0 },
};

unsigned int codec_get_tag(const CodecTag *tags, int id)
{
    while (tags->id != 0) {
        if (tags->id == id)
            return tags->tag;
        tags++;
    }
    return 0;
}

static unsigned int codec_get_asf_tag(const CodecTag *tags, int id)
{
    while (tags->id != 0) {
        if (!tags->invalid_asf && tags->id == id)
            return tags->tag;
        tags++;
    }
    return 0;
}

int codec_get_id(const CodecTag *tags, unsigned int tag)
{
    while (tags->id != 0) {
        if (tags->tag == tag)
            return tags->id;
        tags++;
    }
    return 0;
}

unsigned int codec_get_bmp_tag(int id)
{
    return codec_get_tag(codec_bmp_tags, id);
}

/* BITMAPINFOHEADER header */
void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf)
{
    put_le32(pb, 40); /* size */
    put_le32(pb, enc->width);
    put_le32(pb, enc->height);
    put_le16(pb, 1); /* planes */
    put_le16(pb, 24); /* depth */
    /* compression type */
    put_le32(pb, for_asf ? codec_get_asf_tag(tags, enc->codec_id) : codec_get_tag(tags, enc->codec_id));
    put_le32(pb, enc->width * enc->height * 3);
    put_le32(pb, 0);
    put_le32(pb, 0);
    put_le32(pb, 0);
    put_le32(pb, 0);
}

static void parse_specific_params(AVCodecContext *stream, int *au_byterate, int *au_ssize, int *au_scale)
{
    switch(stream->codec_id) {
    case CODEC_ID_PCM_S16LE:
       *au_scale = *au_ssize = 2*stream->channels;
       *au_byterate = *au_ssize * stream->sample_rate;
        break;
    case CODEC_ID_PCM_U8:
    case CODEC_ID_PCM_ALAW:
    case CODEC_ID_PCM_MULAW:
        *au_scale = *au_ssize = stream->channels;
        *au_byterate = *au_ssize * stream->sample_rate;
        break;
    case CODEC_ID_MP2:
        *au_ssize = 1;
        *au_scale = 1;
        *au_byterate = stream->bit_rate / 8;
    case CODEC_ID_MP3LAME:
        *au_ssize = 1;
        *au_scale = 1;
        *au_byterate = stream->bit_rate / 8;    
    default:
        *au_ssize = 1;
        *au_scale = 1; 
        *au_byterate = stream->bit_rate / 8;
        break;
    }
}

static int avi_write_header(AVFormatContext *s)
{
    AVIContext *avi = s->priv_data;
    ByteIOContext *pb = &s->pb;
    int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
    AVCodecContext *stream, *video_enc;
    offset_t list1, list2, strh, strf;

    put_tag(pb, "RIFF");
    put_le32(pb, 0); /* file length */
    put_tag(pb, "AVI ");

    /* header list */
    list1 = start_tag(pb, "LIST");
    put_tag(pb, "hdrl");

    /* avi header */
    put_tag(pb, "avih");
    put_le32(pb, 14 * 4);
    bitrate = 0;

    video_enc = NULL;
    for(n=0;n<s->nb_streams;n++) {
        stream = &s->streams[n]->codec;
        bitrate += stream->bit_rate;
        if (stream->codec_type == CODEC_TYPE_VIDEO)
            video_enc = stream;
    }
    
    if (!video_enc) {
        av_free(avi);
        return -1;
    }
    nb_frames = 0;

    put_le32(pb, (UINT32)(INT64_C(1000000) * FRAME_RATE_BASE / video_enc->frame_rate));
    put_le32(pb, bitrate / 8); /* XXX: not quite exact */
    put_le32(pb, 0); /* padding */
    put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
    avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
    put_le32(pb, nb_frames); /* nb frames, filled later */
    put_le32(pb, 0); /* initial frame */
    put_le32(pb, s->nb_streams); /* nb streams */
    put_le32(pb, 1024 * 1024); /* suggested buffer size */
    put_le32(pb, video_enc->width);
    put_le32(pb, video_enc->height);
    put_le32(pb, 0); /* reserved */
    put_le32(pb, 0); /* reserved */
    put_le32(pb, 0); /* reserved */
    put_le32(pb, 0); /* reserved */
    
    /* stream list */
    for(i=0;i<n;i++) {
        list2 = start_tag(pb, "LIST");
        put_tag(pb, "strl");
    
        stream = &s->streams[i]->codec;

        /* stream generic header */
        strh = start_tag(pb, "strh");
        switch(stream->codec_type) {
        case CODEC_TYPE_VIDEO:
            put_tag(pb, "vids");
            put_le32(pb, codec_get_bmp_tag(stream->codec_id));
            put_le32(pb, 0); /* flags */
            put_le16(pb, 0); /* priority */
            put_le16(pb, 0); /* language */
            put_le32(pb, 0); /* initial frame */
            put_le32(pb, 1000); /* scale */
            put_le32(pb, (1000 * stream->frame_rate) / FRAME_RATE_BASE); /* rate */
            put_le32(pb, 0); /* start */
            avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
            put_le32(pb, nb_frames); /* length, XXX: fill later */
            put_le32(pb, 1024 * 1024); /* suggested buffer size */
            put_le32(pb, -1); /* quality */
            put_le32(pb, stream->width * stream->height * 3); /* sample size */
            put_le16(pb, 0);
            put_le16(pb, 0);
            put_le16(pb, stream->width);
            put_le16(pb, stream->height);
            break;
        case CODEC_TYPE_AUDIO:
            put_tag(pb, "auds");
            put_le32(pb, 1); /* tag */
            put_le32(pb, 0); /* flags */
            put_le16(pb, 0); /* priority */
            put_le16(pb, 0); /* language */
            put_le32(pb, 0); /* initial frame */
            parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
            put_le32(pb, au_scale); /* scale */
            put_le32(pb, au_byterate); /* rate */
            put_le32(pb, 0); /* start */
            avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
            put_le32(pb, 0); /* length, XXX: filled later */
            put_le32(pb, 12 * 1024); /* suggested buffer size */
            put_le32(pb, -1); /* quality */
            put_le32(pb, au_ssize); /* sample size */
            put_le32(pb, 0);
            put_le32(pb, 0);
            break;
        default:
            av_abort();
        }
        end_tag(pb, strh);

        strf = start_tag(pb, "strf");
        switch(stream->codec_type) {
        case CODEC_TYPE_VIDEO:
	    put_bmp_header(pb, stream, codec_bmp_tags, 0);
            break;
        case CODEC_TYPE_AUDIO:
            if (put_wav_header(pb, stream) < 0) {
                av_free(avi);
                return -1;
            }
            break;
        default:
            av_abort();
        }
        end_tag(pb, strf);
        end_tag(pb, list2);
    }

    end_tag(pb, list1);
    
    avi->movi_list = start_tag(pb, "LIST");
    avi->first = NULL;
    avi->last = NULL;
    put_tag(pb, "movi");

    put_flush_packet(pb);

    return 0;
}

static int avi_write_packet(AVFormatContext *s, int stream_index,
                            UINT8 *buf, int size, int force_pts)
{
    AVIContext *avi = s->priv_data;
    ByteIOContext *pb = &s->pb;
    AVIIndex *idx;
    unsigned char tag[5];
    unsigned int flags;
    AVCodecContext *enc;
    
    enc = &s->streams[stream_index]->codec;

    tag[0] = '0';
    tag[1] = '0' + stream_index;
    if (enc->codec_type == CODEC_TYPE_VIDEO) {
        tag[2] = 'd';
        tag[3] = 'c';
        flags = enc->coded_frame->key_frame ? 0x10 : 0x00;
    } else {
        tag[2] = 'w';
        tag[3] = 'b';
        flags = 0x10;
    }
    if (enc->codec_type == CODEC_TYPE_AUDIO) 
       avi->audio_strm_length[stream_index] += size;

    if (!url_is_streamed(&s->pb)) {
        idx = av_malloc(sizeof(AVIIndex));
        memcpy(idx->tag, tag, 4);
        idx->flags = flags;
        idx->pos = url_ftell(pb) - avi->movi_list;
        idx->len = size;
        idx->next = NULL;
        if (!avi->last)
            avi->first = idx;
        else
            avi->last->next = idx;
        avi->last = idx;
    }
    
    put_buffer(pb, tag, 4);
    put_le32(pb, size);
    put_buffer(pb, buf, size);
    if (size & 1)
        put_byte(pb, 0);

    put_flush_packet(pb);
    return 0;
}

static int avi_write_trailer(AVFormatContext *s)
{
    ByteIOContext *pb = &s->pb;
    AVIContext *avi = s->priv_data;
    offset_t file_size, idx_chunk;
    int n, nb_frames, au_byterate, au_ssize, au_scale;
    AVCodecContext *stream;
    AVIIndex *idx;

    if (!url_is_streamed(&s->pb)) {
        end_tag(pb, avi->movi_list);

        idx_chunk = start_tag(pb, "idx1");
        idx = avi->first;
        while (idx != NULL) {
            put_buffer(pb, idx->tag, 4);
            put_le32(pb, idx->flags);
            put_le32(pb, idx->pos);
            put_le32(pb, idx->len);
            idx = idx->next;
        }
        end_tag(pb, idx_chunk);
        
        /* update file size */
        file_size = url_ftell(pb);
        url_fseek(pb, 4, SEEK_SET);
        put_le32(pb, (UINT32)(file_size - 8));

        /* Fill in frame/sample counters */
        nb_frames = 0;
        for(n=0;n<s->nb_streams;n++) {
            if (avi->frames_hdr_strm[n] != 0) {
                stream = &s->streams[n]->codec;
                url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
                if (stream->codec_type == CODEC_TYPE_VIDEO) {
                    put_le32(pb, stream->frame_number); 
                    if (nb_frames < stream->frame_number)
                        nb_frames = stream->frame_number;
                } else {
                    if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3LAME) {
                        put_le32(pb, stream->frame_number);
                        nb_frames += stream->frame_number;
                    } else {
                        parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
                        put_le32(pb, avi->audio_strm_length[n] / au_ssize);
                    }
                }
            }
       }
       if (avi->frames_hdr_all != 0) {
           url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
           put_le32(pb, nb_frames); 
       }
        url_fseek(pb, file_size, SEEK_SET);
    }
    put_flush_packet(pb);
    return 0;
}

static AVOutputFormat avi_oformat = {
    "avi",
    "avi format",
    "video/x-msvideo",
    "avi",
    sizeof(AVIContext),
    CODEC_ID_MP2,
    CODEC_ID_MSMPEG4V3,
    avi_write_header,
    avi_write_packet,
    avi_write_trailer,
};

int avienc_init(void)
{
    av_register_output_format(&avi_oformat);
    return 0;
}
Commit	Line	Data
de6d9b64 FB	1	/*
de6d9b64 FB	2	* AVI encoder.
19720f15	3	* Copyright (c) 2000 Fabrice Bellard.
de6d9b64	4	*
19720f15 FB	5	* This library is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU Lesser General Public
	7	* License as published by the Free Software Foundation; either
	8	* version 2 of the License, or (at your option) any later version.
de6d9b64	9	*
19720f15	10	* This library is distributed in the hope that it will be useful,
de6d9b64	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
19720f15 FB	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19720f15 FB	13	* Lesser General Public License for more details.
de6d9b64	14	*
19720f15 FB	15	* You should have received a copy of the GNU Lesser General Public
	16	* License along with this library; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
de6d9b64	18	*/
de6d9b64 FB	19	#include "avformat.h"
	20	#include "avi.h"
	21
	22	/*
	23	* TODO:
	24	* - fill all fields if non streamed (nb_frames for example)
	25	*/
	26
	27	typedef struct AVIIndex {
	28	unsigned char tag[4];
	29	unsigned int flags, pos, len;
	30	struct AVIIndex *next;
	31	} AVIIndex;
	32
	33	typedef struct {
86bec9a1 J	34	offset_t movi_list, frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
86bec9a1 J	35	int audio_strm_length[MAX_STREAMS];
de6d9b64 FB	36	AVIIndex first, last;
	37	} AVIContext;
	38
0570bf06	39	offset_t start_tag(ByteIOContext pb, const char tag)
de6d9b64 FB	40	{
	41	put_tag(pb, tag);
	42	put_le32(pb, 0);
	43	return url_ftell(pb);
	44	}
	45
	46	void end_tag(ByteIOContext *pb, offset_t start)
	47	{
	48	offset_t pos;
	49
	50	pos = url_ftell(pb);
	51	url_fseek(pb, start - 4, SEEK_SET);
8be1c656	52	put_le32(pb, (UINT32)(pos - start));
de6d9b64 FB	53	url_fseek(pb, pos, SEEK_SET);
	54	}
	55
	56	/* Note: when encoding, the first matching tag is used, so order is
	57	important if multiple tags possible for a given codec. */
0570bf06	58	const CodecTag codec_bmp_tags[] = {
95c79a24 J	59	{ CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
95c79a24 J	60	{ CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
de6d9b64 FB	61	{ CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
de6d9b64 FB	62	{ CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
b1d89f82 MR	63	{ CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X'), .invalid_asf = 1 },
	64	{ CODEC_ID_MPEG4, MKTAG('d', 'i', 'v', 'x'), .invalid_asf = 1 },
	65	{ CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0'), .invalid_asf = 1 },
	66	{ CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D'), .invalid_asf = 1 },
	67	{ CODEC_ID_MPEG4, MKTAG('x', 'v', 'i', 'd'), .invalid_asf = 1 },
	68	{ CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 's'), .invalid_asf = 1 },
390dffc5 MN	69	{ CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
	70	{ CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
	71	{ CODEC_ID_MPEG4, MKTAG('m', '4', 's', '2') },
58f26ba9	72	{ CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
b1d89f82	73	{ CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3'), .invalid_asf = 1 }, /* default signature when using MSMPEG4 */
8a555875	74	{ CODEC_ID_MSMPEG4V3, MKTAG('d', 'i', 'v', '3'), .invalid_asf = 1 },
bb3debab GV	75	{ CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
bb3debab GV	76	{ CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
9b030d9d MN	77	{ CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
9b030d9d MN	78	{ CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
020fcc94 FB	79	{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
020fcc94 FB	80	{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
f20dca40	81	{ CODEC_ID_DVVIDEO, MKTAG('D', 'V', 'S', 'D') },
020fcc94	82	{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
1cbc2890 FB	83	{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
	84	{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
	85	{ CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
bb15f7fd	86	{ CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
f560dd82 MN	87	{ CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
f560dd82 MN	88	{ CODEC_ID_HUFFYUV, MKTAG('h', 'f', 'y', 'u') },
de6d9b64 FB	89	{ 0, 0 },
	90	};
	91
a266644f	92	unsigned int codec_get_tag(const CodecTag *tags, int id)
de6d9b64 FB	93	{
	94	while (tags->id != 0) {
	95	if (tags->id == id)
	96	return tags->tag;
	97	tags++;
	98	}
	99	return 0;
	100	}
	101
2727c35e PG	102	static unsigned int codec_get_asf_tag(const CodecTag *tags, int id)
	103	{
	104	while (tags->id != 0) {
	105	if (!tags->invalid_asf && tags->id == id)
	106	return tags->tag;
	107	tags++;
	108	}
	109	return 0;
	110	}
	111
a266644f	112	int codec_get_id(const CodecTag *tags, unsigned int tag)
de6d9b64 FB	113	{
	114	while (tags->id != 0) {
	115	if (tags->tag == tag)
	116	return tags->id;
	117	tags++;
	118	}
	119	return 0;
	120	}
	121
	122	unsigned int codec_get_bmp_tag(int id)
	123	{
	124	return codec_get_tag(codec_bmp_tags, id);
	125	}
	126
	127	/* BITMAPINFOHEADER header */
0570bf06	128	void put_bmp_header(ByteIOContext pb, AVCodecContext enc, const CodecTag *tags, int for_asf)
de6d9b64 FB	129	{
	130	put_le32(pb, 40); /* size */
	131	put_le32(pb, enc->width);
	132	put_le32(pb, enc->height);
	133	put_le16(pb, 1); /* planes */
	134	put_le16(pb, 24); /* depth */
	135	/* compression type */
2727c35e	136	put_le32(pb, for_asf ? codec_get_asf_tag(tags, enc->codec_id) : codec_get_tag(tags, enc->codec_id));
de6d9b64 FB	137	put_le32(pb, enc->width * enc->height * 3);
	138	put_le32(pb, 0);
	139	put_le32(pb, 0);
	140	put_le32(pb, 0);
	141	put_le32(pb, 0);
	142	}
	143
0570bf06	144	static void parse_specific_params(AVCodecContext stream, int au_byterate, int au_ssize, int au_scale)
86bec9a1 J	145	{
	146	switch(stream->codec_id) {
	147	case CODEC_ID_PCM_S16LE:
	148	au_scale = au_ssize = 2*stream->channels;
	149	au_byterate = au_ssize * stream->sample_rate;
	150	break;
	151	case CODEC_ID_PCM_U8:
	152	case CODEC_ID_PCM_ALAW:
	153	case CODEC_ID_PCM_MULAW:
	154	au_scale = au_ssize = stream->channels;
	155	au_byterate = au_ssize * stream->sample_rate;
	156	break;
	157	case CODEC_ID_MP2:
	158	*au_ssize = 1;
	159	*au_scale = 1;
	160	*au_byterate = stream->bit_rate / 8;
5798368b J	161	case CODEC_ID_MP3LAME:
	162	*au_ssize = 1;
	163	*au_scale = 1;
	164	*au_byterate = stream->bit_rate / 8;
86bec9a1 J	165	default:
	166	*au_ssize = 1;
	167	*au_scale = 1;
	168	*au_byterate = stream->bit_rate / 8;
	169	break;
	170	}
	171	}
	172
de6d9b64 FB	173	static int avi_write_header(AVFormatContext *s)
de6d9b64 FB	174	{
c9a65ca8	175	AVIContext *avi = s->priv_data;
de6d9b64	176	ByteIOContext *pb = &s->pb;
86bec9a1	177	int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
de6d9b64 FB	178	AVCodecContext stream, video_enc;
	179	offset_t list1, list2, strh, strf;
	180
de6d9b64 FB	181	put_tag(pb, "RIFF");
	182	put_le32(pb, 0); /* file length */
	183	put_tag(pb, "AVI ");
	184
	185	/* header list */
	186	list1 = start_tag(pb, "LIST");
	187	put_tag(pb, "hdrl");
	188
	189	/* avi header */
	190	put_tag(pb, "avih");
	191	put_le32(pb, 14 * 4);
	192	bitrate = 0;
	193
	194	video_enc = NULL;
	195	for(n=0;n<s->nb_streams;n++) {
	196	stream = &s->streams[n]->codec;
	197	bitrate += stream->bit_rate;
	198	if (stream->codec_type == CODEC_TYPE_VIDEO)
	199	video_enc = stream;
	200	}
	201
	202	if (!video_enc) {
1ea4f593	203	av_free(avi);
de6d9b64 FB	204	return -1;
	205	}
	206	nb_frames = 0;
	207
8be1c656	208	put_le32(pb, (UINT32)(INT64_C(1000000) * FRAME_RATE_BASE / video_enc->frame_rate));
de6d9b64 FB	209	put_le32(pb, bitrate / 8); /* XXX: not quite exact */
	210	put_le32(pb, 0); /* padding */
	211	put_le32(pb, AVIF_TRUSTCKTYPE \| AVIF_HASINDEX \| AVIF_ISINTERLEAVED); /* flags */
86bec9a1	212	avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
de6d9b64 FB	213	put_le32(pb, nb_frames); /* nb frames, filled later */
	214	put_le32(pb, 0); /* initial frame */
	215	put_le32(pb, s->nb_streams); /* nb streams */
	216	put_le32(pb, 1024 * 1024); /* suggested buffer size */
	217	put_le32(pb, video_enc->width);
	218	put_le32(pb, video_enc->height);
	219	put_le32(pb, 0); /* reserved */
	220	put_le32(pb, 0); /* reserved */
	221	put_le32(pb, 0); /* reserved */
	222	put_le32(pb, 0); /* reserved */
	223
	224	/* stream list */
	225	for(i=0;i<n;i++) {
	226	list2 = start_tag(pb, "LIST");
	227	put_tag(pb, "strl");
	228
	229	stream = &s->streams[i]->codec;
	230
	231	/* stream generic header */
	232	strh = start_tag(pb, "strh");
	233	switch(stream->codec_type) {
	234	case CODEC_TYPE_VIDEO:
	235	put_tag(pb, "vids");
	236	put_le32(pb, codec_get_bmp_tag(stream->codec_id));
	237	put_le32(pb, 0); /* flags */
	238	put_le16(pb, 0); /* priority */
	239	put_le16(pb, 0); /* language */
	240	put_le32(pb, 0); /* initial frame */
	241	put_le32(pb, 1000); /* scale */
	242	put_le32(pb, (1000 * stream->frame_rate) / FRAME_RATE_BASE); /* rate */
	243	put_le32(pb, 0); /* start */
86bec9a1	244	avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
de6d9b64 FB	245	put_le32(pb, nb_frames); /* length, XXX: fill later */
de6d9b64 FB	246	put_le32(pb, 1024 * 1024); /* suggested buffer size */
86bec9a1	247	put_le32(pb, -1); /* quality */
de6d9b64 FB	248	put_le32(pb, stream->width * stream->height * 3); /* sample size */
	249	put_le16(pb, 0);
	250	put_le16(pb, 0);
	251	put_le16(pb, stream->width);
	252	put_le16(pb, stream->height);
	253	break;
	254	case CODEC_TYPE_AUDIO:
	255	put_tag(pb, "auds");
86bec9a1	256	put_le32(pb, 1); /* tag */
de6d9b64 FB	257	put_le32(pb, 0); /* flags */
	258	put_le16(pb, 0); /* priority */
	259	put_le16(pb, 0); /* language */
	260	put_le32(pb, 0); /* initial frame */
86bec9a1 J	261	parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
	262	put_le32(pb, au_scale); /* scale */
	263	put_le32(pb, au_byterate); /* rate */
de6d9b64	264	put_le32(pb, 0); /* start */
86bec9a1	265	avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
de6d9b64 FB	266	put_le32(pb, 0); /* length, XXX: filled later */
	267	put_le32(pb, 12 * 1024); /* suggested buffer size */
	268	put_le32(pb, -1); /* quality */
86bec9a1	269	put_le32(pb, au_ssize); /* sample size */
de6d9b64 FB	270	put_le32(pb, 0);
	271	put_le32(pb, 0);
	272	break;
53cafac0	273	default:
42343f7e	274	av_abort();
de6d9b64 FB	275	}
	276	end_tag(pb, strh);
	277
	278	strf = start_tag(pb, "strf");
	279	switch(stream->codec_type) {
	280	case CODEC_TYPE_VIDEO:
2727c35e	281	put_bmp_header(pb, stream, codec_bmp_tags, 0);
de6d9b64 FB	282	break;
de6d9b64 FB	283	case CODEC_TYPE_AUDIO:
46a3d068	284	if (put_wav_header(pb, stream) < 0) {
1ea4f593	285	av_free(avi);
46a3d068 FB	286	return -1;
46a3d068 FB	287	}
de6d9b64	288	break;
53cafac0	289	default:
42343f7e	290	av_abort();
de6d9b64 FB	291	}
	292	end_tag(pb, strf);
	293	end_tag(pb, list2);
	294	}
	295
	296	end_tag(pb, list1);
	297
	298	avi->movi_list = start_tag(pb, "LIST");
	299	avi->first = NULL;
	300	avi->last = NULL;
	301	put_tag(pb, "movi");
	302
	303	put_flush_packet(pb);
	304
	305	return 0;
	306	}
	307
	308	static int avi_write_packet(AVFormatContext *s, int stream_index,
10bb7023	309	UINT8 *buf, int size, int force_pts)
de6d9b64 FB	310	{
	311	AVIContext *avi = s->priv_data;
	312	ByteIOContext *pb = &s->pb;
	313	AVIIndex *idx;
	314	unsigned char tag[5];
	315	unsigned int flags;
	316	AVCodecContext *enc;
	317
	318	enc = &s->streams[stream_index]->codec;
	319
	320	tag[0] = '0';
	321	tag[1] = '0' + stream_index;
	322	if (enc->codec_type == CODEC_TYPE_VIDEO) {
	323	tag[2] = 'd';
	324	tag[3] = 'c';
492cd3a9	325	flags = enc->coded_frame->key_frame ? 0x10 : 0x00;
de6d9b64 FB	326	} else {
	327	tag[2] = 'w';
	328	tag[3] = 'b';
	329	flags = 0x10;
	330	}
86bec9a1 J	331	if (enc->codec_type == CODEC_TYPE_AUDIO)
86bec9a1 J	332	avi->audio_strm_length[stream_index] += size;
de6d9b64 FB	333
de6d9b64 FB	334	if (!url_is_streamed(&s->pb)) {
1ea4f593	335	idx = av_malloc(sizeof(AVIIndex));
de6d9b64 FB	336	memcpy(idx->tag, tag, 4);
	337	idx->flags = flags;
	338	idx->pos = url_ftell(pb) - avi->movi_list;
	339	idx->len = size;
	340	idx->next = NULL;
	341	if (!avi->last)
	342	avi->first = idx;
	343	else
	344	avi->last->next = idx;
	345	avi->last = idx;
	346	}
	347
	348	put_buffer(pb, tag, 4);
	349	put_le32(pb, size);
	350	put_buffer(pb, buf, size);
	351	if (size & 1)
	352	put_byte(pb, 0);
	353
	354	put_flush_packet(pb);
	355	return 0;
	356	}
	357
	358	static int avi_write_trailer(AVFormatContext *s)
	359	{
	360	ByteIOContext *pb = &s->pb;
	361	AVIContext *avi = s->priv_data;
	362	offset_t file_size, idx_chunk;
86bec9a1 J	363	int n, nb_frames, au_byterate, au_ssize, au_scale;
86bec9a1 J	364	AVCodecContext *stream;
de6d9b64 FB	365	AVIIndex *idx;
	366
	367	if (!url_is_streamed(&s->pb)) {
	368	end_tag(pb, avi->movi_list);
	369
	370	idx_chunk = start_tag(pb, "idx1");
	371	idx = avi->first;
	372	while (idx != NULL) {
	373	put_buffer(pb, idx->tag, 4);
	374	put_le32(pb, idx->flags);
	375	put_le32(pb, idx->pos);
	376	put_le32(pb, idx->len);
	377	idx = idx->next;
	378	}
	379	end_tag(pb, idx_chunk);
	380
	381	/* update file size */
	382	file_size = url_ftell(pb);
	383	url_fseek(pb, 4, SEEK_SET);
8be1c656	384	put_le32(pb, (UINT32)(file_size - 8));
86bec9a1 J	385
	386	/* Fill in frame/sample counters */
	387	nb_frames = 0;
	388	for(n=0;n<s->nb_streams;n++) {
	389	if (avi->frames_hdr_strm[n] != 0) {
	390	stream = &s->streams[n]->codec;
	391	url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
	392	if (stream->codec_type == CODEC_TYPE_VIDEO) {
	393	put_le32(pb, stream->frame_number);
	394	if (nb_frames < stream->frame_number)
	395	nb_frames = stream->frame_number;
	396	} else {
5798368b	397	if (stream->codec_id == CODEC_ID_MP2 \|\| stream->codec_id == CODEC_ID_MP3LAME) {
86bec9a1 J	398	put_le32(pb, stream->frame_number);
	399	nb_frames += stream->frame_number;
	400	} else {
	401	parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
	402	put_le32(pb, avi->audio_strm_length[n] / au_ssize);
	403	}
	404	}
	405	}
	406	}
	407	if (avi->frames_hdr_all != 0) {
	408	url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
	409	put_le32(pb, nb_frames);
	410	}
de6d9b64 FB	411	url_fseek(pb, file_size, SEEK_SET);
	412	}
	413	put_flush_packet(pb);
de6d9b64 FB	414	return 0;
	415	}
	416
c9a65ca8	417	static AVOutputFormat avi_oformat = {
de6d9b64 FB	418	"avi",
	419	"avi format",
	420	"video/x-msvideo",
	421	"avi",
c9a65ca8	422	sizeof(AVIContext),
de6d9b64	423	CODEC_ID_MP2,
d7425f59	424	CODEC_ID_MSMPEG4V3,
de6d9b64 FB	425	avi_write_header,
	426	avi_write_packet,
	427	avi_write_trailer,
de6d9b64	428	};
c9a65ca8 FB	429
	430	int avienc_init(void)
	431	{
	432	av_register_output_format(&avi_oformat);
	433	return 0;
	434	}