ffmpeg-2.8.5
git-svn-id: svn://kolibrios.org@6147 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
374
contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavformat/ffmenc.c
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374
contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavformat/ffmenc.c
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@@ -0,0 +1,374 @@
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/*
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* FFM (ffserver live feed) muxer
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* Copyright (c) 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/intreadwrite.h"
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#include "libavutil/intfloat.h"
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#include "libavutil/avassert.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/opt.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "internal.h"
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#include "ffm.h"
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static void flush_packet(AVFormatContext *s)
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{
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FFMContext *ffm = s->priv_data;
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int fill_size, h;
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AVIOContext *pb = s->pb;
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fill_size = ffm->packet_end - ffm->packet_ptr;
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memset(ffm->packet_ptr, 0, fill_size);
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av_assert1(avio_tell(pb) % ffm->packet_size == 0);
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/* put header */
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avio_wb16(pb, PACKET_ID);
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avio_wb16(pb, fill_size);
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avio_wb64(pb, ffm->dts);
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h = ffm->frame_offset;
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if (ffm->first_packet)
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h |= 0x8000;
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avio_wb16(pb, h);
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avio_write(pb, ffm->packet, ffm->packet_end - ffm->packet);
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avio_flush(pb);
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/* prepare next packet */
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ffm->frame_offset = 0; /* no key frame */
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ffm->packet_ptr = ffm->packet;
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ffm->first_packet = 0;
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}
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/* 'first' is true if first data of a frame */
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static void ffm_write_data(AVFormatContext *s,
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const uint8_t *buf, int size,
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int64_t dts, int header)
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{
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FFMContext *ffm = s->priv_data;
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int len;
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if (header && ffm->frame_offset == 0) {
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ffm->frame_offset = ffm->packet_ptr - ffm->packet + FFM_HEADER_SIZE;
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ffm->dts = dts;
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}
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/* write as many packets as needed */
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while (size > 0) {
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len = ffm->packet_end - ffm->packet_ptr;
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if (len > size)
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len = size;
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memcpy(ffm->packet_ptr, buf, len);
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ffm->packet_ptr += len;
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buf += len;
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size -= len;
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if (ffm->packet_ptr >= ffm->packet_end)
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flush_packet(s);
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}
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}
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static void write_header_chunk(AVIOContext *pb, AVIOContext *dpb, unsigned id)
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{
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uint8_t *dyn_buf;
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int dyn_size= avio_close_dyn_buf(dpb, &dyn_buf);
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avio_wb32(pb, id);
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avio_wb32(pb, dyn_size);
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avio_write(pb, dyn_buf, dyn_size);
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av_free(dyn_buf);
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}
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static int ffm_write_header_codec_private_ctx(AVFormatContext *s, AVCodecContext *ctx, int type)
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{
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AVIOContext *pb = s->pb;
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AVIOContext *tmp;
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char *buf = NULL;
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int ret;
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const AVCodec *enc = ctx->codec ? ctx->codec : avcodec_find_encoder(ctx->codec_id);
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if (!enc) {
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av_log(s, AV_LOG_WARNING, "Stream codec is not found. Codec private options are not stored.\n");
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return 0;
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}
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if (ctx->priv_data && enc->priv_class && enc->priv_data_size) {
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if ((ret = av_opt_serialize(ctx->priv_data, AV_OPT_FLAG_ENCODING_PARAM | type,
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AV_OPT_SERIALIZE_SKIP_DEFAULTS, &buf, '=', ',')) < 0)
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return ret;
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if (buf && strlen(buf)) {
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if (avio_open_dyn_buf(&tmp) < 0) {
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av_free(buf);
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return AVERROR(ENOMEM);
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}
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avio_put_str(tmp, buf);
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write_header_chunk(pb, tmp, MKBETAG('C', 'P', 'R', 'V'));
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}
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av_free(buf);
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}
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return 0;
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}
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static int ffm_write_header_codec_ctx(AVIOContext *pb, AVCodecContext *ctx, unsigned tag, int type)
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{
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AVIOContext *tmp;
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char *buf = NULL;
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int ret, need_coma = 0;
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#define SKIP_DEFAULTS AV_OPT_SERIALIZE_SKIP_DEFAULTS
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#define OPT_FLAGS_EXACT AV_OPT_SERIALIZE_OPT_FLAGS_EXACT
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#define ENC AV_OPT_FLAG_ENCODING_PARAM
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if (avio_open_dyn_buf(&tmp) < 0)
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return AVERROR(ENOMEM);
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if ((ret = av_opt_serialize(ctx, ENC | type, SKIP_DEFAULTS, &buf, '=', ',')) < 0)
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goto fail;
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if (buf && strlen(buf)) {
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avio_write(tmp, buf, strlen(buf));
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av_freep(&buf);
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need_coma = 1;
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}
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if ((ret = av_opt_serialize(ctx, 0, SKIP_DEFAULTS | OPT_FLAGS_EXACT, &buf, '=', ',')) < 0)
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goto fail;
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if (buf && strlen(buf)) {
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if (need_coma)
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avio_w8(tmp, ',');
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avio_write(tmp, buf, strlen(buf));
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}
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av_freep(&buf);
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avio_w8(tmp, 0);
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write_header_chunk(pb, tmp, tag);
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return 0;
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fail:
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av_free(buf);
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ffio_free_dyn_buf(&tmp);
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return ret;
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#undef SKIP_DEFAULTS
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#undef OPT_FLAGS_EXACT
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#undef ENC
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}
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static int ffm_write_recommended_config(AVIOContext *pb, AVCodecContext *ctx, unsigned tag,
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const char *configuration)
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{
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int ret;
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const AVCodec *enc = ctx->codec ? ctx->codec : avcodec_find_encoder(ctx->codec_id);
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AVIOContext *tmp;
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AVDictionaryEntry *t = NULL;
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AVDictionary *all = NULL, *comm = NULL, *prv = NULL;
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char *buf = NULL;
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if (!enc || !enc->priv_class || !enc->priv_data_size) {
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/* codec is not known/has no private options, so save everything as common options */
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if (avio_open_dyn_buf(&tmp) < 0)
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return AVERROR(ENOMEM);
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avio_put_str(tmp, configuration);
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write_header_chunk(pb, tmp, tag);
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return 0;
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}
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if ((ret = av_dict_parse_string(&all, configuration, "=", ",", 0)) < 0)
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return ret;
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while ((t = av_dict_get(all, "", t, AV_DICT_IGNORE_SUFFIX))) {
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if (av_opt_find((void *)&enc->priv_class, t->key, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ)) {
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if ((ret = av_dict_set(&prv, t->key, t->value, 0)) < 0)
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goto fail;
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} else if ((ret = av_dict_set(&comm, t->key, t->value, 0)) < 0)
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goto fail;
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}
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if (comm) {
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if ((ret = av_dict_get_string(comm, &buf, '=', ',')) < 0 ||
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(ret = avio_open_dyn_buf(&tmp)) < 0)
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goto fail;
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avio_put_str(tmp, buf);
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av_freep(&buf);
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write_header_chunk(pb, tmp, tag);
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}
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if (prv) {
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if ((ret = av_dict_get_string(prv, &buf, '=', ',')) < 0 ||
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(ret = avio_open_dyn_buf(&tmp)) < 0)
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goto fail;
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avio_put_str(tmp, buf);
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write_header_chunk(pb, tmp, MKBETAG('C', 'P', 'R', 'V'));
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}
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fail:
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av_free(buf);
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av_dict_free(&all);
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av_dict_free(&comm);
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av_dict_free(&prv);
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return ret;
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}
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static int ffm_write_header(AVFormatContext *s)
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{
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FFMContext *ffm = s->priv_data;
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AVDictionaryEntry *t;
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AVStream *st;
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AVIOContext *pb = s->pb;
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AVCodecContext *codec;
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int bit_rate, i, ret;
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if (t = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
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ret = av_parse_time(&ffm->start_time, t->value, 0);
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if (ret < 0)
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return ret;
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}
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ffm->packet_size = FFM_PACKET_SIZE;
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/* header */
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avio_wl32(pb, MKTAG('F', 'F', 'M', '2'));
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avio_wb32(pb, ffm->packet_size);
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avio_wb64(pb, 0); /* current write position */
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if(avio_open_dyn_buf(&pb) < 0)
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return AVERROR(ENOMEM);
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avio_wb32(pb, s->nb_streams);
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bit_rate = 0;
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for(i=0;i<s->nb_streams;i++) {
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st = s->streams[i];
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bit_rate += st->codec->bit_rate;
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}
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avio_wb32(pb, bit_rate);
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write_header_chunk(s->pb, pb, MKBETAG('M', 'A', 'I', 'N'));
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/* list of streams */
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for(i=0;i<s->nb_streams;i++) {
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st = s->streams[i];
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avpriv_set_pts_info(st, 64, 1, 1000000);
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if(avio_open_dyn_buf(&pb) < 0)
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return AVERROR(ENOMEM);
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codec = st->codec;
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/* generic info */
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avio_wb32(pb, codec->codec_id);
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avio_w8(pb, codec->codec_type);
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avio_wb32(pb, codec->bit_rate);
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avio_wb32(pb, codec->flags);
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avio_wb32(pb, codec->flags2);
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avio_wb32(pb, codec->debug);
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if (codec->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
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avio_wb32(pb, codec->extradata_size);
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avio_write(pb, codec->extradata, codec->extradata_size);
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}
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write_header_chunk(s->pb, pb, MKBETAG('C', 'O', 'M', 'M'));
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/* specific info */
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switch(codec->codec_type) {
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case AVMEDIA_TYPE_VIDEO:
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if (st->recommended_encoder_configuration) {
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av_log(NULL, AV_LOG_DEBUG, "writing recommended configuration: %s\n",
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st->recommended_encoder_configuration);
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if ((ret = ffm_write_recommended_config(s->pb, codec, MKBETAG('S', '2', 'V', 'I'),
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st->recommended_encoder_configuration)) < 0)
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return ret;
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} else if ((ret = ffm_write_header_codec_ctx(s->pb, codec, MKBETAG('S', '2', 'V', 'I'), AV_OPT_FLAG_VIDEO_PARAM)) < 0 ||
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(ret = ffm_write_header_codec_private_ctx(s, codec, AV_OPT_FLAG_VIDEO_PARAM)) < 0)
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return ret;
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break;
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case AVMEDIA_TYPE_AUDIO:
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if (st->recommended_encoder_configuration) {
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av_log(NULL, AV_LOG_DEBUG, "writing recommended configuration: %s\n",
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st->recommended_encoder_configuration);
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if ((ret = ffm_write_recommended_config(s->pb, codec, MKBETAG('S', '2', 'A', 'U'),
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st->recommended_encoder_configuration)) < 0)
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return ret;
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} else if ((ret = ffm_write_header_codec_ctx(s->pb, codec, MKBETAG('S', '2', 'A', 'U'), AV_OPT_FLAG_AUDIO_PARAM)) < 0 ||
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(ret = ffm_write_header_codec_private_ctx(s, codec, AV_OPT_FLAG_AUDIO_PARAM)) < 0)
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return ret;
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break;
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default:
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return -1;
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}
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}
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pb = s->pb;
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avio_wb64(pb, 0); // end of header
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/* flush until end of block reached */
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while ((avio_tell(pb) % ffm->packet_size) != 0)
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avio_w8(pb, 0);
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avio_flush(pb);
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/* init packet mux */
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ffm->packet_ptr = ffm->packet;
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ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE;
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av_assert0(ffm->packet_end >= ffm->packet);
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ffm->frame_offset = 0;
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ffm->dts = 0;
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ffm->first_packet = 1;
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return 0;
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}
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static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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FFMContext *ffm = s->priv_data;
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int64_t dts;
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uint8_t header[FRAME_HEADER_SIZE+4];
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int header_size = FRAME_HEADER_SIZE;
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dts = ffm->start_time + pkt->dts;
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/* packet size & key_frame */
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header[0] = pkt->stream_index;
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header[1] = 0;
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if (pkt->flags & AV_PKT_FLAG_KEY)
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header[1] |= FLAG_KEY_FRAME;
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AV_WB24(header+2, pkt->size);
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AV_WB24(header+5, pkt->duration);
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AV_WB64(header+8, ffm->start_time + pkt->pts);
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if (pkt->pts != pkt->dts) {
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header[1] |= FLAG_DTS;
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AV_WB32(header+16, pkt->pts - pkt->dts);
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header_size += 4;
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}
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ffm_write_data(s, header, header_size, dts, 1);
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ffm_write_data(s, pkt->data, pkt->size, dts, 0);
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return 0;
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}
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static int ffm_write_trailer(AVFormatContext *s)
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{
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FFMContext *ffm = s->priv_data;
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/* flush packets */
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if (ffm->packet_ptr > ffm->packet)
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flush_packet(s);
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return 0;
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}
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AVOutputFormat ff_ffm_muxer = {
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.name = "ffm",
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.long_name = NULL_IF_CONFIG_SMALL("FFM (FFserver live feed)"),
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.extensions = "ffm",
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.priv_data_size = sizeof(FFMContext),
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.audio_codec = AV_CODEC_ID_MP2,
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.video_codec = AV_CODEC_ID_MPEG1VIDEO,
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.write_header = ffm_write_header,
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.write_packet = ffm_write_packet,
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.write_trailer = ffm_write_trailer,
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.flags = AVFMT_TS_NEGATIVE,
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};
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