libavformat: remove the ffmenc and ffmdec muxer and demuxers

Used only by ffserver.

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Changelog

@@ -36,6 +36,7 @@ version <next>:
 - aiir audio filter
 - aiff: add support for CD-ROM XA ADPCM
 - Removed the ffserver program
+- Removed the ffmenc and ffmdec muxer and demuxer
 
 
 version 3.4:

libavformat/Makefile

@@ -161,8 +161,6 @@ OBJS-$(CONFIG_EA_DEMUXER)                += electronicarts.o
 OBJS-$(CONFIG_EAC3_DEMUXER)              += ac3dec.o rawdec.o
 OBJS-$(CONFIG_EAC3_MUXER)                += rawenc.o
 OBJS-$(CONFIG_EPAF_DEMUXER)              += epafdec.o pcm.o
-OBJS-$(CONFIG_FFM_DEMUXER)               += ffmdec.o
-OBJS-$(CONFIG_FFM_MUXER)                 += ffmenc.o
 OBJS-$(CONFIG_FFMETADATA_DEMUXER)        += ffmetadec.o
 OBJS-$(CONFIG_FFMETADATA_MUXER)          += ffmetaenc.o
 OBJS-$(CONFIG_FIFO_MUXER)                += fifo.o

libavformat/allformats.c

@@ -120,7 +120,6 @@ static void register_all(void)
     REGISTER_MUXDEMUX(EAC3,             eac3);
     REGISTER_DEMUXER (EPAF,             epaf);
     REGISTER_MUXER   (F4V,              f4v);
-    REGISTER_MUXDEMUX(FFM,              ffm);
     REGISTER_MUXDEMUX(FFMETADATA,       ffmetadata);
     REGISTER_MUXER   (FIFO,             fifo);
     REGISTER_MUXDEMUX(FILMSTRIP,        filmstrip);

libavformat/ffm.h

-/*
- * FFM (ffserver live feed) common header
- * Copyright (c) 2001 Fabrice Bellard
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg 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 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef AVFORMAT_FFM_H
-#define AVFORMAT_FFM_H
-
-#include <stdint.h>
-#include "avformat.h"
-#include "avio.h"
-
-/* The FFM file is made of blocks of fixed size */
-#define FFM_HEADER_SIZE 14
-#define FFM_PACKET_SIZE 4096
-#define PACKET_ID       0x666d
-
-/* each packet contains frames (which can span several packets */
-#define FRAME_HEADER_SIZE    16
-#define FLAG_KEY_FRAME       0x01
-#define FLAG_DTS             0x02
-
-enum {
-    READ_HEADER,
-    READ_DATA,
-};
-
-typedef struct FFMContext {
-    const AVClass *class;
-    /* only reading mode */
-    int64_t write_index, file_size;
-    int read_state;
-    uint8_t header[FRAME_HEADER_SIZE+4];
-
-    /* read and write */
-    int first_packet; /* true if first packet, needed to set the discontinuity tag */
-    int packet_size;
-    int frame_offset;
-    int64_t dts;
-    uint8_t *packet_ptr, *packet_end;
-    uint8_t packet[FFM_PACKET_SIZE];
-    int64_t start_time;
-    int server_attached;
-} FFMContext;
-
-#endif /* AVFORMAT_FFM_H */

libavformat/ffmenc.c

-/*
- * FFM (ffserver live feed) muxer
- * Copyright (c) 2001 Fabrice Bellard
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg 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 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat.h"
-#include "libavutil/avassert.h"
-#include "libavutil/parseutils.h"
-#include "libavutil/opt.h"
-#include "avformat.h"
-#include "avio_internal.h"
-#include "internal.h"
-#include "ffm.h"
-
-static void flush_packet(AVFormatContext *s)
-{
-    FFMContext *ffm = s->priv_data;
-    int fill_size, h;
-    AVIOContext *pb = s->pb;
-
-    fill_size = ffm->packet_end - ffm->packet_ptr;
-    memset(ffm->packet_ptr, 0, fill_size);
-
-    av_assert1(avio_tell(pb) % ffm->packet_size == 0);
-
-    /* put header */
-    avio_wb16(pb, PACKET_ID);
-    avio_wb16(pb, fill_size);
-    avio_wb64(pb, ffm->dts);
-    h = ffm->frame_offset;
-    if (ffm->first_packet)
-        h |= 0x8000;
-    avio_wb16(pb, h);
-    avio_write(pb, ffm->packet, ffm->packet_end - ffm->packet);
-    avio_flush(pb);
-
-    /* prepare next packet */
-    ffm->frame_offset = 0; /* no key frame */
-    ffm->packet_ptr = ffm->packet;
-    ffm->first_packet = 0;
-}
-
-/* 'first' is true if first data of a frame */
-static void ffm_write_data(AVFormatContext *s,
-                           const uint8_t *buf, int size,
-                           int64_t dts, int header)
-{
-    FFMContext *ffm = s->priv_data;
-    int len;
-
-    if (header && ffm->frame_offset == 0) {
-        ffm->frame_offset = ffm->packet_ptr - ffm->packet + FFM_HEADER_SIZE;
-        ffm->dts = dts;
-    }
-
-    /* write as many packets as needed */
-    while (size > 0) {
-        len = ffm->packet_end - ffm->packet_ptr;
-        if (len > size)
-            len = size;
-        memcpy(ffm->packet_ptr, buf, len);
-
-        ffm->packet_ptr += len;
-        buf += len;
-        size -= len;
-        if (ffm->packet_ptr >= ffm->packet_end)
-            flush_packet(s);
-    }
-}
-
-static void write_header_chunk(AVIOContext *pb, AVIOContext *dpb, unsigned id)
-{
-    uint8_t *dyn_buf;
-    int dyn_size= avio_close_dyn_buf(dpb, &dyn_buf);
-    avio_wb32(pb, id);
-    avio_wb32(pb, dyn_size);
-    avio_write(pb, dyn_buf, dyn_size);
-    av_free(dyn_buf);
-}
-
-static int ffm_write_header_codec_ctx(AVIOContext *pb, AVCodecParameters *ctxpar, unsigned tag, int type)
-{
-    AVIOContext *tmp;
-    char *buf = NULL;
-    int ret, need_coma = 0;
-    AVCodecContext *ctx = NULL;
-
-#define SKIP_DEFAULTS   AV_OPT_SERIALIZE_SKIP_DEFAULTS
-#define OPT_FLAGS_EXACT AV_OPT_SERIALIZE_OPT_FLAGS_EXACT
-#define ENC             AV_OPT_FLAG_ENCODING_PARAM
-
-    if (avio_open_dyn_buf(&tmp) < 0)
-        return AVERROR(ENOMEM);
-
-    // AVCodecParameters does not suport AVOptions, we thus must copy it over to a context that does
-    // otherwise it could be used directly and this would be much simpler
-    ctx = avcodec_alloc_context3(NULL);
-    if (!ctx) {
-        ret = AVERROR(ENOMEM);
-        goto fail;
-    }
-    avcodec_parameters_to_context(ctx, ctxpar);
-
-    if ((ret = av_opt_serialize(ctx, ENC | type, SKIP_DEFAULTS, &buf, '=', ',')) < 0)
-        goto fail;
-    if (buf && strlen(buf)) {
-        avio_write(tmp, buf, strlen(buf));
-        av_freep(&buf);
-        need_coma = 1;
-    }
-    if ((ret = av_opt_serialize(ctx, 0, SKIP_DEFAULTS | OPT_FLAGS_EXACT, &buf, '=', ',')) < 0)
-        goto fail;
-    if (buf && strlen(buf)) {
-        if (need_coma)
-            avio_w8(tmp, ',');
-        avio_write(tmp, buf, strlen(buf));
-    }
-    av_freep(&buf);
-    avio_w8(tmp, 0);
-    write_header_chunk(pb, tmp, tag);
-    avcodec_free_context(&ctx);
-    return 0;
-  fail:
-    av_free(buf);
-    ffio_free_dyn_buf(&tmp);
-    avcodec_free_context(&ctx);
-    return ret;
-
-#undef SKIP_DEFAULTS
-#undef OPT_FLAGS_EXACT
-#undef ENC
-}
-
-static int ffm_write_recommended_config(AVIOContext *pb, AVCodecParameters *codecpar, unsigned tag,
-                                        const char *configuration)
-{
-    int ret;
-    const AVCodec *enc = avcodec_find_encoder(codecpar->codec_id);
-    AVIOContext *tmp;
-    AVDictionaryEntry *t = NULL;
-    AVDictionary *all = NULL, *comm = NULL, *prv = NULL;
-    char *buf = NULL;
-
-    if (!enc || !enc->priv_class || !enc->priv_data_size) {
-        /* codec is not known/has no private options, so save everything as common options */
-        if (avio_open_dyn_buf(&tmp) < 0)
-            return AVERROR(ENOMEM);
-        avio_put_str(tmp, configuration);
-        write_header_chunk(pb, tmp, tag);
-        return 0;
-    }
-
-    if ((ret = av_dict_parse_string(&all, configuration, "=", ",", 0)) < 0)
-        return ret;
-
-    while ((t = av_dict_get(all, "", t, AV_DICT_IGNORE_SUFFIX))) {
-        if (av_opt_find((void *)&enc->priv_class, t->key, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ)) {
-            if ((ret = av_dict_set(&prv, t->key, t->value, 0)) < 0)
-                goto fail;
-        } else if ((ret = av_dict_set(&comm, t->key, t->value, 0)) < 0)
-            goto fail;
-    }
-
-    if (comm) {
-        if ((ret = av_dict_get_string(comm, &buf, '=', ',')) < 0 ||
-            (ret = avio_open_dyn_buf(&tmp)) < 0)
-            goto fail;
-        avio_put_str(tmp, buf);
-        av_freep(&buf);
-        write_header_chunk(pb, tmp, tag);
-    }
-    if (prv) {
-        if ((ret = av_dict_get_string(prv, &buf, '=', ',')) < 0 ||
-            (ret = avio_open_dyn_buf(&tmp)) < 0)
-            goto fail;
-        avio_put_str(tmp, buf);
-        write_header_chunk(pb, tmp, MKBETAG('C', 'P', 'R', 'V'));
-    }
-
-  fail:
-    av_free(buf);
-    av_dict_free(&all);
-    av_dict_free(&comm);
-    av_dict_free(&prv);
-    return ret;
-}
-
-static int ffm_write_header(AVFormatContext *s)
-{
-    FFMContext *ffm = s->priv_data;
-    AVStream *st;
-    AVIOContext *pb = s->pb;
-    AVCodecParameters *codecpar;
-    int bit_rate, i, ret;
-
-    if ((ret = ff_parse_creation_time_metadata(s, &ffm->start_time, 0)) < 0)
-        return ret;
-
-    ffm->packet_size = FFM_PACKET_SIZE;
-
-    /* header */
-    avio_wl32(pb, MKTAG('F', 'F', 'M', '2'));
-    avio_wb32(pb, ffm->packet_size);
-    avio_wb64(pb, 0); /* current write position */
-
-    if(avio_open_dyn_buf(&pb) < 0)
-        return AVERROR(ENOMEM);
-
-    avio_wb32(pb, s->nb_streams);
-    bit_rate = 0;
-    for(i=0;i<s->nb_streams;i++) {
-        st = s->streams[i];
-        bit_rate += st->codecpar->bit_rate;
-    }
-    avio_wb32(pb, bit_rate);
-
-    write_header_chunk(s->pb, pb, MKBETAG('M', 'A', 'I', 'N'));
-
-    /* list of streams */
-    for(i=0;i<s->nb_streams;i++) {
-        int flags = 0;
-        st = s->streams[i];
-        avpriv_set_pts_info(st, 64, 1, 1000000);
-        if(avio_open_dyn_buf(&pb) < 0)
-            return AVERROR(ENOMEM);
-
-        codecpar = st->codecpar;
-        /* generic info */
-        avio_wb32(pb, codecpar->codec_id);
-        avio_w8(pb, codecpar->codec_type);
-        avio_wb32(pb, codecpar->bit_rate);
-        if (codecpar->extradata_size)
-            flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
-
-        // If the user is not providing us with a configuration we have to fill it in as we cannot access the encoder
-        if (!st->recommended_encoder_configuration) {
-            if (s->flags & AVFMT_FLAG_BITEXACT)
-                flags |= AV_CODEC_FLAG_BITEXACT;
-        }
-
-        avio_wb32(pb, flags);
-        avio_wb32(pb, 0); // flags2
-        avio_wb32(pb, 0); // debug
-        if (codecpar->extradata_size) {
-            avio_wb32(pb, codecpar->extradata_size);
-            avio_write(pb, codecpar->extradata, codecpar->extradata_size);
-        }
-        write_header_chunk(s->pb, pb, MKBETAG('C', 'O', 'M', 'M'));
-        /* specific info */
-        switch(codecpar->codec_type) {
-        case AVMEDIA_TYPE_VIDEO:
-            if (st->recommended_encoder_configuration) {
-                av_log(NULL, AV_LOG_DEBUG, "writing recommended configuration: %s\n",
-                       st->recommended_encoder_configuration);
-                if ((ret = ffm_write_recommended_config(s->pb, codecpar, MKBETAG('S', '2', 'V', 'I'),
-                                                        st->recommended_encoder_configuration)) < 0)
-                return ret;
-            } else if ((ret = ffm_write_header_codec_ctx(s->pb, codecpar, MKBETAG('S', '2', 'V', 'I'), AV_OPT_FLAG_VIDEO_PARAM)) < 0)
-                return ret;
-            break;
-        case AVMEDIA_TYPE_AUDIO:
-            if (st->recommended_encoder_configuration) {
-                av_log(NULL, AV_LOG_DEBUG, "writing recommended configuration: %s\n",
-                       st->recommended_encoder_configuration);
-                if ((ret = ffm_write_recommended_config(s->pb, codecpar, MKBETAG('S', '2', 'A', 'U'),
-                                                        st->recommended_encoder_configuration)) < 0)
-                return ret;
-            } else if ((ret = ffm_write_header_codec_ctx(s->pb, codecpar, MKBETAG('S', '2', 'A', 'U'), AV_OPT_FLAG_AUDIO_PARAM)) < 0)
-                return ret;
-            break;
-        default:
-            return -1;
-        }
-    }
-    pb = s->pb;
-
-    avio_wb64(pb, 0); // end of header
-
-    /* flush until end of block reached */
-    while ((avio_tell(pb) % ffm->packet_size) != 0)
-        avio_w8(pb, 0);
-
-    avio_flush(pb);
-
-    /* init packet mux */
-    ffm->packet_ptr = ffm->packet;
-    ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE;
-    av_assert0(ffm->packet_end >= ffm->packet);
-    ffm->frame_offset = 0;
-    ffm->dts = 0;
-    ffm->first_packet = 1;
-
-    return 0;
-}
-
-static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
-    FFMContext *ffm = s->priv_data;
-    int64_t dts;
-    uint8_t header[FRAME_HEADER_SIZE+4];
-    int header_size = FRAME_HEADER_SIZE;
-
-    dts = ffm->start_time + pkt->dts;
-    /* packet size & key_frame */
-    header[0] = pkt->stream_index;
-    header[1] = 0;
-    if (pkt->flags & AV_PKT_FLAG_KEY)
-        header[1] |= FLAG_KEY_FRAME;
-    AV_WB24(header+2, pkt->size);
-    AV_WB24(header+5, pkt->duration);
-    AV_WB64(header+8, ffm->start_time + pkt->pts);
-    if (pkt->pts != pkt->dts) {
-        header[1] |= FLAG_DTS;
-        AV_WB32(header+16, pkt->pts - pkt->dts);
-        header_size += 4;
-    }
-    ffm_write_data(s, header, header_size, dts, 1);
-    ffm_write_data(s, pkt->data, pkt->size, dts, 0);
-
-    return 0;
-}
-
-static int ffm_write_trailer(AVFormatContext *s)
-{
-    FFMContext *ffm = s->priv_data;
-
-    /* flush packets */
-    if (ffm->packet_ptr > ffm->packet)
-        flush_packet(s);
-
-    return 0;
-}
-
-AVOutputFormat ff_ffm_muxer = {
-    .name              = "ffm",
-    .long_name         = NULL_IF_CONFIG_SMALL("FFM (FFserver live feed)"),
-    .extensions        = "ffm",
-    .priv_data_size    = sizeof(FFMContext),
-    .audio_codec       = AV_CODEC_ID_MP2,
-    .video_codec       = AV_CODEC_ID_MPEG1VIDEO,
-    .write_header      = ffm_write_header,
-    .write_packet      = ffm_write_packet,
-    .write_trailer     = ffm_write_trailer,
-    .flags             = AVFMT_TS_NEGATIVE,
-};