Prefix all _demuxer, _muxer, _protocol from libavformat and libavdevice.
[ffmpeg.git] / libavformat / ffmenc.c
1 /*
2  * FFM (ffserver live feed) muxer
3  * Copyright (c) 2001 Fabrice Bellard
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 #include "libavutil/intreadwrite.h"
23 #include "avformat.h"
24 #include "ffm.h"
25
26 static void flush_packet(AVFormatContext *s)
27 {
28     FFMContext *ffm = s->priv_data;
29     int fill_size, h;
30     ByteIOContext *pb = s->pb;
31
32     fill_size = ffm->packet_end - ffm->packet_ptr;
33     memset(ffm->packet_ptr, 0, fill_size);
34
35     if (url_ftell(pb) % ffm->packet_size)
36         av_abort();
37
38     /* put header */
39     put_be16(pb, PACKET_ID);
40     put_be16(pb, fill_size);
41     put_be64(pb, ffm->dts);
42     h = ffm->frame_offset;
43     if (ffm->first_packet)
44         h |= 0x8000;
45     put_be16(pb, h);
46     put_buffer(pb, ffm->packet, ffm->packet_end - ffm->packet);
47     put_flush_packet(pb);
48
49     /* prepare next packet */
50     ffm->frame_offset = 0; /* no key frame */
51     ffm->packet_ptr = ffm->packet;
52     ffm->first_packet = 0;
53 }
54
55 /* 'first' is true if first data of a frame */
56 static void ffm_write_data(AVFormatContext *s,
57                            const uint8_t *buf, int size,
58                            int64_t dts, int header)
59 {
60     FFMContext *ffm = s->priv_data;
61     int len;
62
63     if (header && ffm->frame_offset == 0) {
64         ffm->frame_offset = ffm->packet_ptr - ffm->packet + FFM_HEADER_SIZE;
65         ffm->dts = dts;
66     }
67
68     /* write as many packets as needed */
69     while (size > 0) {
70         len = ffm->packet_end - ffm->packet_ptr;
71         if (len > size)
72             len = size;
73         memcpy(ffm->packet_ptr, buf, len);
74
75         ffm->packet_ptr += len;
76         buf += len;
77         size -= len;
78         if (ffm->packet_ptr >= ffm->packet_end)
79             flush_packet(s);
80     }
81 }
82
83 static int ffm_write_header(AVFormatContext *s)
84 {
85     FFMContext *ffm = s->priv_data;
86     AVStream *st;
87     ByteIOContext *pb = s->pb;
88     AVCodecContext *codec;
89     int bit_rate, i;
90
91     ffm->packet_size = FFM_PACKET_SIZE;
92
93     /* header */
94     put_le32(pb, MKTAG('F', 'F', 'M', '1'));
95     put_be32(pb, ffm->packet_size);
96     put_be64(pb, 0); /* current write position */
97
98     put_be32(pb, s->nb_streams);
99     bit_rate = 0;
100     for(i=0;i<s->nb_streams;i++) {
101         st = s->streams[i];
102         bit_rate += st->codec->bit_rate;
103     }
104     put_be32(pb, bit_rate);
105
106     /* list of streams */
107     for(i=0;i<s->nb_streams;i++) {
108         st = s->streams[i];
109         av_set_pts_info(st, 64, 1, 1000000);
110
111         codec = st->codec;
112         /* generic info */
113         put_be32(pb, codec->codec_id);
114         put_byte(pb, codec->codec_type);
115         put_be32(pb, codec->bit_rate);
116         put_be32(pb, st->quality);
117         put_be32(pb, codec->flags);
118         put_be32(pb, codec->flags2);
119         put_be32(pb, codec->debug);
120         /* specific info */
121         switch(codec->codec_type) {
122         case AVMEDIA_TYPE_VIDEO:
123             put_be32(pb, codec->time_base.num);
124             put_be32(pb, codec->time_base.den);
125             put_be16(pb, codec->width);
126             put_be16(pb, codec->height);
127             put_be16(pb, codec->gop_size);
128             put_be32(pb, codec->pix_fmt);
129             put_byte(pb, codec->qmin);
130             put_byte(pb, codec->qmax);
131             put_byte(pb, codec->max_qdiff);
132             put_be16(pb, (int) (codec->qcompress * 10000.0));
133             put_be16(pb, (int) (codec->qblur * 10000.0));
134             put_be32(pb, codec->bit_rate_tolerance);
135             avio_put_str(pb, codec->rc_eq ? codec->rc_eq : "tex^qComp");
136             put_be32(pb, codec->rc_max_rate);
137             put_be32(pb, codec->rc_min_rate);
138             put_be32(pb, codec->rc_buffer_size);
139             put_be64(pb, av_dbl2int(codec->i_quant_factor));
140             put_be64(pb, av_dbl2int(codec->b_quant_factor));
141             put_be64(pb, av_dbl2int(codec->i_quant_offset));
142             put_be64(pb, av_dbl2int(codec->b_quant_offset));
143             put_be32(pb, codec->dct_algo);
144             put_be32(pb, codec->strict_std_compliance);
145             put_be32(pb, codec->max_b_frames);
146             put_be32(pb, codec->luma_elim_threshold);
147             put_be32(pb, codec->chroma_elim_threshold);
148             put_be32(pb, codec->mpeg_quant);
149             put_be32(pb, codec->intra_dc_precision);
150             put_be32(pb, codec->me_method);
151             put_be32(pb, codec->mb_decision);
152             put_be32(pb, codec->nsse_weight);
153             put_be32(pb, codec->frame_skip_cmp);
154             put_be64(pb, av_dbl2int(codec->rc_buffer_aggressivity));
155             put_be32(pb, codec->codec_tag);
156             put_byte(pb, codec->thread_count);
157             put_be32(pb, codec->coder_type);
158             put_be32(pb, codec->me_cmp);
159             put_be32(pb, codec->partitions);
160             put_be32(pb, codec->me_subpel_quality);
161             put_be32(pb, codec->me_range);
162             put_be32(pb, codec->keyint_min);
163             put_be32(pb, codec->scenechange_threshold);
164             put_be32(pb, codec->b_frame_strategy);
165             put_be64(pb, av_dbl2int(codec->qcompress));
166             put_be64(pb, av_dbl2int(codec->qblur));
167             put_be32(pb, codec->max_qdiff);
168             put_be32(pb, codec->refs);
169             put_be32(pb, codec->directpred);
170             break;
171         case AVMEDIA_TYPE_AUDIO:
172             put_be32(pb, codec->sample_rate);
173             put_le16(pb, codec->channels);
174             put_le16(pb, codec->frame_size);
175             put_le16(pb, codec->sample_fmt);
176             break;
177         default:
178             return -1;
179         }
180         if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) {
181             put_be32(pb, codec->extradata_size);
182             put_buffer(pb, codec->extradata, codec->extradata_size);
183         }
184     }
185
186     /* flush until end of block reached */
187     while ((url_ftell(pb) % ffm->packet_size) != 0)
188         put_byte(pb, 0);
189
190     put_flush_packet(pb);
191
192     /* init packet mux */
193     ffm->packet_ptr = ffm->packet;
194     ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE;
195     assert(ffm->packet_end >= ffm->packet);
196     ffm->frame_offset = 0;
197     ffm->dts = 0;
198     ffm->first_packet = 1;
199
200     return 0;
201 }
202
203 static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt)
204 {
205     int64_t dts;
206     uint8_t header[FRAME_HEADER_SIZE+4];
207     int header_size = FRAME_HEADER_SIZE;
208
209     dts = s->timestamp + pkt->dts;
210     /* packet size & key_frame */
211     header[0] = pkt->stream_index;
212     header[1] = 0;
213     if (pkt->flags & AV_PKT_FLAG_KEY)
214         header[1] |= FLAG_KEY_FRAME;
215     AV_WB24(header+2, pkt->size);
216     AV_WB24(header+5, pkt->duration);
217     AV_WB64(header+8, s->timestamp + pkt->pts);
218     if (pkt->pts != pkt->dts) {
219         header[1] |= FLAG_DTS;
220         AV_WB32(header+16, pkt->pts - pkt->dts);
221         header_size += 4;
222     }
223     ffm_write_data(s, header, header_size, dts, 1);
224     ffm_write_data(s, pkt->data, pkt->size, dts, 0);
225
226     return 0;
227 }
228
229 static int ffm_write_trailer(AVFormatContext *s)
230 {
231     ByteIOContext *pb = s->pb;
232     FFMContext *ffm = s->priv_data;
233
234     /* flush packets */
235     if (ffm->packet_ptr > ffm->packet)
236         flush_packet(s);
237
238     put_flush_packet(pb);
239
240     return 0;
241 }
242
243 AVOutputFormat ff_ffm_muxer = {
244     "ffm",
245     NULL_IF_CONFIG_SMALL("FFM (FFserver live feed) format"),
246     "",
247     "ffm",
248     sizeof(FFMContext),
249     /* not really used */
250     CODEC_ID_MP2,
251     CODEC_ID_MPEG1VIDEO,
252     ffm_write_header,
253     ffm_write_packet,
254     ffm_write_trailer,
255 };