Fix build: Add intreadwrite.h and bswap.h #includes where necessary.
[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     /* XXX: store write position in other file ? */
97     put_be64(pb, ffm->packet_size); /* current write position */
98
99     put_be32(pb, s->nb_streams);
100     bit_rate = 0;
101     for(i=0;i<s->nb_streams;i++) {
102         st = s->streams[i];
103         bit_rate += st->codec->bit_rate;
104     }
105     put_be32(pb, bit_rate);
106
107     /* list of streams */
108     for(i=0;i<s->nb_streams;i++) {
109         st = s->streams[i];
110         av_set_pts_info(st, 64, 1, 1000000);
111
112         codec = st->codec;
113         /* generic info */
114         put_be32(pb, codec->codec_id);
115         put_byte(pb, codec->codec_type);
116         put_be32(pb, codec->bit_rate);
117         put_be32(pb, st->quality);
118         put_be32(pb, codec->flags);
119         put_be32(pb, codec->flags2);
120         put_be32(pb, codec->debug);
121         /* specific info */
122         switch(codec->codec_type) {
123         case CODEC_TYPE_VIDEO:
124             put_be32(pb, codec->time_base.num);
125             put_be32(pb, codec->time_base.den);
126             put_be16(pb, codec->width);
127             put_be16(pb, codec->height);
128             put_be16(pb, codec->gop_size);
129             put_be32(pb, codec->pix_fmt);
130             put_byte(pb, codec->qmin);
131             put_byte(pb, codec->qmax);
132             put_byte(pb, codec->max_qdiff);
133             put_be16(pb, (int) (codec->qcompress * 10000.0));
134             put_be16(pb, (int) (codec->qblur * 10000.0));
135             put_be32(pb, codec->bit_rate_tolerance);
136             put_strz(pb, codec->rc_eq ? codec->rc_eq : "tex^qComp");
137             put_be32(pb, codec->rc_max_rate);
138             put_be32(pb, codec->rc_min_rate);
139             put_be32(pb, codec->rc_buffer_size);
140             put_be64(pb, av_dbl2int(codec->i_quant_factor));
141             put_be64(pb, av_dbl2int(codec->b_quant_factor));
142             put_be64(pb, av_dbl2int(codec->i_quant_offset));
143             put_be64(pb, av_dbl2int(codec->b_quant_offset));
144             put_be32(pb, codec->dct_algo);
145             put_be32(pb, codec->strict_std_compliance);
146             put_be32(pb, codec->max_b_frames);
147             put_be32(pb, codec->luma_elim_threshold);
148             put_be32(pb, codec->chroma_elim_threshold);
149             put_be32(pb, codec->mpeg_quant);
150             put_be32(pb, codec->intra_dc_precision);
151             put_be32(pb, codec->me_method);
152             put_be32(pb, codec->mb_decision);
153             put_be32(pb, codec->nsse_weight);
154             put_be32(pb, codec->frame_skip_cmp);
155             put_be64(pb, av_dbl2int(codec->rc_buffer_aggressivity));
156             put_be32(pb, codec->codec_tag);
157             put_byte(pb, codec->thread_count);
158             break;
159         case CODEC_TYPE_AUDIO:
160             put_be32(pb, codec->sample_rate);
161             put_le16(pb, codec->channels);
162             put_le16(pb, codec->frame_size);
163             break;
164         default:
165             return -1;
166         }
167         if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) {
168             put_be32(pb, codec->extradata_size);
169             put_buffer(pb, codec->extradata, codec->extradata_size);
170         }
171     }
172
173     /* flush until end of block reached */
174     while ((url_ftell(pb) % ffm->packet_size) != 0)
175         put_byte(pb, 0);
176
177     put_flush_packet(pb);
178
179     /* init packet mux */
180     ffm->packet_ptr = ffm->packet;
181     ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE;
182     assert(ffm->packet_end >= ffm->packet);
183     ffm->frame_offset = 0;
184     ffm->dts = 0;
185     ffm->first_packet = 1;
186
187     return 0;
188 }
189
190 static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt)
191 {
192     int64_t dts;
193     uint8_t header[FRAME_HEADER_SIZE+4];
194     int header_size = FRAME_HEADER_SIZE;
195
196     dts = s->timestamp + pkt->dts;
197     /* packet size & key_frame */
198     header[0] = pkt->stream_index;
199     header[1] = 0;
200     if (pkt->flags & PKT_FLAG_KEY)
201         header[1] |= FLAG_KEY_FRAME;
202     AV_WB24(header+2, pkt->size);
203     AV_WB24(header+5, pkt->duration);
204     AV_WB64(header+8, s->timestamp + pkt->pts);
205     if (pkt->pts != pkt->dts) {
206         header[1] |= FLAG_DTS;
207         AV_WB32(header+16, pkt->pts - pkt->dts);
208         header_size += 4;
209     }
210     ffm_write_data(s, header, header_size, dts, 1);
211     ffm_write_data(s, pkt->data, pkt->size, dts, 0);
212
213     return 0;
214 }
215
216 static int ffm_write_trailer(AVFormatContext *s)
217 {
218     ByteIOContext *pb = s->pb;
219     FFMContext *ffm = s->priv_data;
220
221     /* flush packets */
222     if (ffm->packet_ptr > ffm->packet)
223         flush_packet(s);
224
225     put_flush_packet(pb);
226
227     if (!url_is_streamed(pb)) {
228         int64_t size;
229         /* update the write offset */
230         size = url_ftell(pb);
231         url_fseek(pb, 8, SEEK_SET);
232         put_be64(pb, size);
233         put_flush_packet(pb);
234     }
235
236     return 0;
237 }
238
239 AVOutputFormat ffm_muxer = {
240     "ffm",
241     NULL_IF_CONFIG_SMALL("FFM (FFserver live feed) format"),
242     "",
243     "ffm",
244     sizeof(FFMContext),
245     /* not really used */
246     CODEC_ID_MP2,
247     CODEC_ID_MPEG1VIDEO,
248     ffm_write_header,
249     ffm_write_packet,
250     ffm_write_trailer,
251 };