449 lines
14 KiB
C
449 lines
14 KiB
C
/*
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* AVI encoder.
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* Copyright (c) 2000 Fabrice Bellard.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "avformat.h"
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#include "avi.h"
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/*
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* TODO:
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* - fill all fields if non streamed (nb_frames for example)
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*/
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typedef struct AVIIndex {
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unsigned char tag[4];
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unsigned int flags, pos, len;
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struct AVIIndex *next;
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} AVIIndex;
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typedef struct {
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offset_t movi_list, frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
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int audio_strm_length[MAX_STREAMS];
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AVIIndex *first, *last;
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} AVIContext;
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offset_t start_tag(ByteIOContext *pb, const char *tag)
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{
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put_tag(pb, tag);
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put_le32(pb, 0);
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return url_ftell(pb);
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}
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void end_tag(ByteIOContext *pb, offset_t start)
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{
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offset_t pos;
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pos = url_ftell(pb);
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url_fseek(pb, start - 4, SEEK_SET);
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put_le32(pb, (uint32_t)(pos - start));
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url_fseek(pb, pos, SEEK_SET);
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}
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/* Note: when encoding, the first matching tag is used, so order is
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important if multiple tags possible for a given codec. */
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const CodecTag codec_bmp_tags[] = {
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{ CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
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{ CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
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{ CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
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{ CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
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{ CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X'), .invalid_asf = 1 },
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{ CODEC_ID_MPEG4, MKTAG('d', 'i', 'v', 'x'), .invalid_asf = 1 },
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{ CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0'), .invalid_asf = 1 },
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{ CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D'), .invalid_asf = 1 },
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{ CODEC_ID_MPEG4, MKTAG('x', 'v', 'i', 'd'), .invalid_asf = 1 },
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{ CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 's'), .invalid_asf = 1 },
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{ CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
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{ CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
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{ CODEC_ID_MPEG4, MKTAG('m', '4', 's', '2') },
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{ CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
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{ CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3'), .invalid_asf = 1 }, /* default signature when using MSMPEG4 */
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{ CODEC_ID_MSMPEG4V3, MKTAG('d', 'i', 'v', '3'), .invalid_asf = 1 },
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{ CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
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{ CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
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{ CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
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{ CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
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{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
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{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
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{ CODEC_ID_DVVIDEO, MKTAG('D', 'V', 'S', 'D') },
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{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
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{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
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{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
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{ CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
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{ CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
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{ CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
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{ CODEC_ID_HUFFYUV, MKTAG('h', 'f', 'y', 'u') },
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{ CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
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{ CODEC_ID_CYUV, MKTAG('c', 'y', 'u', 'v') },
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{ 0, 0 },
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};
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unsigned int codec_get_tag(const CodecTag *tags, int id)
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{
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while (tags->id != 0) {
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if (tags->id == id)
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return tags->tag;
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tags++;
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}
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return 0;
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}
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static unsigned int codec_get_asf_tag(const CodecTag *tags, int id)
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{
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while (tags->id != 0) {
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if (!tags->invalid_asf && tags->id == id)
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return tags->tag;
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tags++;
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}
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return 0;
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}
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int codec_get_id(const CodecTag *tags, unsigned int tag)
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{
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while (tags->id != 0) {
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if (tags->tag == tag)
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return tags->id;
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tags++;
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}
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return 0;
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}
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unsigned int codec_get_bmp_tag(int id)
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{
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return codec_get_tag(codec_bmp_tags, id);
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}
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/* BITMAPINFOHEADER header */
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void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf)
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{
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put_le32(pb, 40); /* size */
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put_le32(pb, enc->width);
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put_le32(pb, enc->height);
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put_le16(pb, 1); /* planes */
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put_le16(pb, 24); /* depth */
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/* compression type */
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put_le32(pb, for_asf ? codec_get_asf_tag(tags, enc->codec_id) : codec_get_tag(tags, enc->codec_id));
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put_le32(pb, enc->width * enc->height * 3);
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put_le32(pb, 0);
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put_le32(pb, 0);
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put_le32(pb, 0);
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put_le32(pb, 0);
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}
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static void parse_specific_params(AVCodecContext *stream, int *au_byterate, int *au_ssize, int *au_scale)
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{
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switch(stream->codec_id) {
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case CODEC_ID_PCM_S16LE:
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*au_scale = *au_ssize = 2*stream->channels;
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*au_byterate = *au_ssize * stream->sample_rate;
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break;
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case CODEC_ID_PCM_U8:
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case CODEC_ID_PCM_ALAW:
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case CODEC_ID_PCM_MULAW:
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*au_scale = *au_ssize = stream->channels;
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*au_byterate = *au_ssize * stream->sample_rate;
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break;
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case CODEC_ID_MP2:
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*au_ssize = 1;
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*au_scale = 1;
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*au_byterate = stream->bit_rate / 8;
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case CODEC_ID_MP3LAME:
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*au_ssize = 1;
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*au_scale = 1;
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*au_byterate = stream->bit_rate / 8;
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default:
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*au_ssize = 1;
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*au_scale = 1;
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*au_byterate = stream->bit_rate / 8;
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break;
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}
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}
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static int avi_write_header(AVFormatContext *s)
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{
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AVIContext *avi = s->priv_data;
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ByteIOContext *pb = &s->pb;
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int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
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AVCodecContext *stream, *video_enc;
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offset_t list1, list2, strh, strf;
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put_tag(pb, "RIFF");
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put_le32(pb, 0); /* file length */
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put_tag(pb, "AVI ");
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/* header list */
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list1 = start_tag(pb, "LIST");
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put_tag(pb, "hdrl");
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/* avi header */
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put_tag(pb, "avih");
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put_le32(pb, 14 * 4);
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bitrate = 0;
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video_enc = NULL;
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for(n=0;n<s->nb_streams;n++) {
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stream = &s->streams[n]->codec;
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bitrate += stream->bit_rate;
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if (stream->codec_type == CODEC_TYPE_VIDEO)
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video_enc = stream;
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}
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/* allowing audio-only AVI file
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if (!video_enc) {
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av_free(avi);
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return -1;
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}
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*/
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nb_frames = 0;
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if(video_enc){
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put_le32(pb, (uint32_t)(int64_t_C(1000000) * FRAME_RATE_BASE / video_enc->frame_rate));
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} else {
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put_le32(pb, 0);
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}
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put_le32(pb, bitrate / 8); /* XXX: not quite exact */
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put_le32(pb, 0); /* padding */
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put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
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avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
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put_le32(pb, nb_frames); /* nb frames, filled later */
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put_le32(pb, 0); /* initial frame */
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put_le32(pb, s->nb_streams); /* nb streams */
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put_le32(pb, 1024 * 1024); /* suggested buffer size */
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if(video_enc){
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put_le32(pb, video_enc->width);
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put_le32(pb, video_enc->height);
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} else {
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put_le32(pb, 0);
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put_le32(pb, 0);
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}
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put_le32(pb, 0); /* reserved */
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put_le32(pb, 0); /* reserved */
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put_le32(pb, 0); /* reserved */
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put_le32(pb, 0); /* reserved */
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/* stream list */
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for(i=0;i<n;i++) {
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list2 = start_tag(pb, "LIST");
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put_tag(pb, "strl");
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stream = &s->streams[i]->codec;
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/* stream generic header */
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strh = start_tag(pb, "strh");
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switch(stream->codec_type) {
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case CODEC_TYPE_VIDEO:
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put_tag(pb, "vids");
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put_le32(pb, codec_get_bmp_tag(stream->codec_id));
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put_le32(pb, 0); /* flags */
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put_le16(pb, 0); /* priority */
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put_le16(pb, 0); /* language */
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put_le32(pb, 0); /* initial frame */
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put_le32(pb, 1000); /* scale */
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put_le32(pb, (1000 * stream->frame_rate) / FRAME_RATE_BASE); /* rate */
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put_le32(pb, 0); /* start */
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avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
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put_le32(pb, nb_frames); /* length, XXX: fill later */
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put_le32(pb, 1024 * 1024); /* suggested buffer size */
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put_le32(pb, -1); /* quality */
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put_le32(pb, stream->width * stream->height * 3); /* sample size */
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put_le16(pb, 0);
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put_le16(pb, 0);
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put_le16(pb, stream->width);
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put_le16(pb, stream->height);
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break;
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case CODEC_TYPE_AUDIO:
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put_tag(pb, "auds");
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put_le32(pb, 1); /* tag */
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put_le32(pb, 0); /* flags */
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put_le16(pb, 0); /* priority */
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put_le16(pb, 0); /* language */
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put_le32(pb, 0); /* initial frame */
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parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
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put_le32(pb, au_scale); /* scale */
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put_le32(pb, au_byterate); /* rate */
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put_le32(pb, 0); /* start */
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avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
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put_le32(pb, 0); /* length, XXX: filled later */
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put_le32(pb, 12 * 1024); /* suggested buffer size */
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put_le32(pb, -1); /* quality */
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put_le32(pb, au_ssize); /* sample size */
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put_le32(pb, 0);
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put_le32(pb, 0);
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break;
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default:
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av_abort();
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}
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end_tag(pb, strh);
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strf = start_tag(pb, "strf");
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switch(stream->codec_type) {
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case CODEC_TYPE_VIDEO:
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put_bmp_header(pb, stream, codec_bmp_tags, 0);
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break;
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case CODEC_TYPE_AUDIO:
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if (put_wav_header(pb, stream) < 0) {
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av_free(avi);
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return -1;
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}
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break;
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default:
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av_abort();
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}
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end_tag(pb, strf);
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end_tag(pb, list2);
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}
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end_tag(pb, list1);
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avi->movi_list = start_tag(pb, "LIST");
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avi->first = NULL;
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avi->last = NULL;
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put_tag(pb, "movi");
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put_flush_packet(pb);
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return 0;
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}
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static int avi_write_packet(AVFormatContext *s, int stream_index,
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uint8_t *buf, int size, int force_pts)
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{
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AVIContext *avi = s->priv_data;
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ByteIOContext *pb = &s->pb;
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AVIIndex *idx;
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unsigned char tag[5];
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unsigned int flags;
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AVCodecContext *enc;
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enc = &s->streams[stream_index]->codec;
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tag[0] = '0';
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tag[1] = '0' + stream_index;
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if (enc->codec_type == CODEC_TYPE_VIDEO) {
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tag[2] = 'd';
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tag[3] = 'c';
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flags = enc->coded_frame->key_frame ? 0x10 : 0x00;
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} else {
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tag[2] = 'w';
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tag[3] = 'b';
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flags = 0x10;
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}
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if (enc->codec_type == CODEC_TYPE_AUDIO)
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avi->audio_strm_length[stream_index] += size;
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if (!url_is_streamed(&s->pb)) {
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idx = av_malloc(sizeof(AVIIndex));
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memcpy(idx->tag, tag, 4);
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idx->flags = flags;
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idx->pos = url_ftell(pb) - avi->movi_list;
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idx->len = size;
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idx->next = NULL;
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if (!avi->last)
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avi->first = idx;
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else
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avi->last->next = idx;
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avi->last = idx;
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}
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put_buffer(pb, tag, 4);
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put_le32(pb, size);
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put_buffer(pb, buf, size);
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if (size & 1)
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put_byte(pb, 0);
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put_flush_packet(pb);
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return 0;
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}
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static int avi_write_trailer(AVFormatContext *s)
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{
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ByteIOContext *pb = &s->pb;
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AVIContext *avi = s->priv_data;
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offset_t file_size, idx_chunk;
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int n, nb_frames, au_byterate, au_ssize, au_scale;
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AVCodecContext *stream;
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AVIIndex *idx;
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if (!url_is_streamed(&s->pb)) {
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end_tag(pb, avi->movi_list);
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idx_chunk = start_tag(pb, "idx1");
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idx = avi->first;
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while (idx != NULL) {
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put_buffer(pb, idx->tag, 4);
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put_le32(pb, idx->flags);
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put_le32(pb, idx->pos);
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put_le32(pb, idx->len);
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idx = idx->next;
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}
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end_tag(pb, idx_chunk);
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/* update file size */
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file_size = url_ftell(pb);
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url_fseek(pb, 4, SEEK_SET);
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put_le32(pb, (uint32_t)(file_size - 8));
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/* Fill in frame/sample counters */
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nb_frames = 0;
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for(n=0;n<s->nb_streams;n++) {
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if (avi->frames_hdr_strm[n] != 0) {
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stream = &s->streams[n]->codec;
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url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
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if (stream->codec_type == CODEC_TYPE_VIDEO) {
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put_le32(pb, stream->frame_number);
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if (nb_frames < stream->frame_number)
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nb_frames = stream->frame_number;
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} else {
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if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3LAME) {
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put_le32(pb, stream->frame_number);
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nb_frames += stream->frame_number;
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} else {
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parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
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put_le32(pb, avi->audio_strm_length[n] / au_ssize);
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}
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}
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}
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}
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if (avi->frames_hdr_all != 0) {
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url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
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put_le32(pb, nb_frames);
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}
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url_fseek(pb, file_size, SEEK_SET);
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}
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put_flush_packet(pb);
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return 0;
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}
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static AVOutputFormat avi_oformat = {
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"avi",
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"avi format",
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"video/x-msvideo",
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"avi",
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sizeof(AVIContext),
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CODEC_ID_MP2,
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CODEC_ID_MSMPEG4V3,
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avi_write_header,
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avi_write_packet,
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avi_write_trailer,
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};
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int avienc_init(void)
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{
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av_register_output_format(&avi_oformat);
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return 0;
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}
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