Remove avserver.

It has not been properly maintained for years and there is little hope
of that changing in the future.
It appears simpler to write a new replacement from scratch than
unbreaking it.

1 files changed, 0 insertions, 483 deletions

diff --git a/libavformat/ffmdec.c b/libavformat/ffmdec.c
deleted file mode 100644
index acc1dc4110..0000000000
--- a/libavformat/ffmdec.c
+++ /dev/null
@@ -1,483 +0,0 @@
-/*
- * FFM (avserver live feed) demuxer
- * Copyright (c) 2001 Fabrice Bellard
- *
- * This file is part of Libav.
- *
- * Libav 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.
- *
- * Libav 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 Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <stdint.h>
-
-#include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat.h"
-#include "avformat.h"
-#include "internal.h"
-#include "ffm.h"
-
-static int ffm_is_avail_data(AVFormatContext *s, int size)
-{
-    FFMContext *ffm = s->priv_data;
-    int64_t pos, avail_size;
-    int len;
-
-    len = ffm->packet_end - ffm->packet_ptr;
-    if (size <= len)
-        return 1;
-    pos = avio_tell(s->pb);
-    if (!ffm->write_index) {
-        if (pos == ffm->file_size)
-            return AVERROR_EOF;
-        avail_size = ffm->file_size - pos;
-    } else {
-    if (pos == ffm->write_index) {
-        /* exactly at the end of stream */
-        return AVERROR(EAGAIN);
-    } else if (pos < ffm->write_index) {
-        avail_size = ffm->write_index - pos;
-    } else {
-        avail_size = (ffm->file_size - pos) + (ffm->write_index - FFM_PACKET_SIZE);
-    }
-    }
-    avail_size = (avail_size / ffm->packet_size) * (ffm->packet_size - FFM_HEADER_SIZE) + len;
-    if (size <= avail_size)
-        return 1;
-    else
-        return AVERROR(EAGAIN);
-}
-
-static int ffm_resync(AVFormatContext *s, int state)
-{
-    av_log(s, AV_LOG_ERROR, "resyncing\n");
-    while (state != PACKET_ID) {
-        if (s->pb->eof_reached) {
-            av_log(s, AV_LOG_ERROR, "cannot find FFM syncword\n");
-            return -1;
-        }
-        state = (state << 8) | avio_r8(s->pb);
-    }
-    return 0;
-}
-
-/* first is true if we read the frame header */
-static int ffm_read_data(AVFormatContext *s,
-                         uint8_t *buf, int size, int header)
-{
-    FFMContext *ffm = s->priv_data;
-    AVIOContext *pb = s->pb;
-    int len, fill_size, size1, frame_offset, id;
-
-    size1 = size;
-    while (size > 0) {
-    redo:
-        len = ffm->packet_end - ffm->packet_ptr;
-        if (len < 0)
-            return -1;
-        if (len > size)
-            len = size;
-        if (len == 0) {
-            if (avio_tell(pb) == ffm->file_size)
-                avio_seek(pb, ffm->packet_size, SEEK_SET);
-    retry_read:
-            id = avio_rb16(pb); /* PACKET_ID */
-            if (id != PACKET_ID)
-                if (ffm_resync(s, id) < 0)
-                    return -1;
-            fill_size = avio_rb16(pb);
-            ffm->dts = avio_rb64(pb);
-            frame_offset = avio_rb16(pb);
-            avio_read(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE);
-            ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size);
-            if (ffm->packet_end < ffm->packet || frame_offset < 0)
-                return -1;
-            /* if first packet or resynchronization packet, we must
-               handle it specifically */
-            if (ffm->first_packet || (frame_offset & 0x8000)) {
-                if (!frame_offset) {
-                    /* This packet has no frame headers in it */
-                    if (avio_tell(pb) >= ffm->packet_size * 3) {
-                        avio_seek(pb, -ffm->packet_size * 2, SEEK_CUR);
-                        goto retry_read;
-                    }
-                    /* This is bad, we cannot find a valid frame header */
-                    return 0;
-                }
-                ffm->first_packet = 0;
-                if ((frame_offset & 0x7fff) < FFM_HEADER_SIZE)
-                    return -1;
-                ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
-                if (!header)
-                    break;
-            } else {
-                ffm->packet_ptr = ffm->packet;
-            }
-            goto redo;
-        }
-        memcpy(buf, ffm->packet_ptr, len);
-        buf += len;
-        ffm->packet_ptr += len;
-        size -= len;
-        header = 0;
-    }
-    return size1 - size;
-}
-
-/* ensure that acutal seeking happens between FFM_PACKET_SIZE
-   and file_size - FFM_PACKET_SIZE */
-static int64_t ffm_seek1(AVFormatContext *s, int64_t pos1)
-{
-    FFMContext *ffm = s->priv_data;
-    AVIOContext *pb = s->pb;
-    int64_t pos;
-
-    pos = FFMIN(pos1, ffm->file_size - FFM_PACKET_SIZE);
-    pos = FFMAX(pos, FFM_PACKET_SIZE);
-    av_dlog(s, "seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
-    return avio_seek(pb, pos, SEEK_SET);
-}
-
-static int64_t get_dts(AVFormatContext *s, int64_t pos)
-{
-    AVIOContext *pb = s->pb;
-    int64_t dts;
-
-    ffm_seek1(s, pos);
-    avio_skip(pb, 4);
-    dts = avio_rb64(pb);
-    av_dlog(s, "dts=%0.6f\n", dts / 1000000.0);
-    return dts;
-}
-
-static void adjust_write_index(AVFormatContext *s)
-{
-    FFMContext *ffm = s->priv_data;
-    AVIOContext *pb = s->pb;
-    int64_t pts;
-    //int64_t orig_write_index = ffm->write_index;
-    int64_t pos_min, pos_max;
-    int64_t pts_start;
-    int64_t ptr = avio_tell(pb);
-
-
-    pos_min = 0;
-    pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
-
-    pts_start = get_dts(s, pos_min);
-
-    pts = get_dts(s, pos_max);
-
-    if (pts - 100000 > pts_start)
-        goto end;
-
-    ffm->write_index = FFM_PACKET_SIZE;
-
-    pts_start = get_dts(s, pos_min);
-
-    pts = get_dts(s, pos_max);
-
-    if (pts - 100000 <= pts_start) {
-        while (1) {
-            int64_t newpos;
-            int64_t newpts;
-
-            newpos = ((pos_max + pos_min) / (2 * FFM_PACKET_SIZE)) * FFM_PACKET_SIZE;
-
-            if (newpos == pos_min)
-                break;
-
-            newpts = get_dts(s, newpos);
-
-            if (newpts - 100000 <= pts) {
-                pos_max = newpos;
-                pts = newpts;
-            } else {
-                pos_min = newpos;
-            }
-        }
-        ffm->write_index += pos_max;
-    }
-
- end:
-    avio_seek(pb, ptr, SEEK_SET);
-}
-
-
-static int ffm_close(AVFormatContext *s)
-{
-    int i;
-
-    for (i = 0; i < s->nb_streams; i++)
-        av_freep(&s->streams[i]->codec->rc_eq);
-
-    return 0;
-}
-
-
-static int ffm_read_header(AVFormatContext *s)
-{
-    FFMContext *ffm = s->priv_data;
-    AVStream *st;
-    AVIOContext *pb = s->pb;
-    AVCodecContext *codec;
-    int i, nb_streams;
-    uint32_t tag;
-
-    /* header */
-    tag = avio_rl32(pb);
-    if (tag != MKTAG('F', 'F', 'M', '1'))
-        goto fail;
-    ffm->packet_size = avio_rb32(pb);
-    if (ffm->packet_size != FFM_PACKET_SIZE)
-        goto fail;
-    ffm->write_index = avio_rb64(pb);
-    /* get also filesize */
-    if (pb->seekable) {
-        ffm->file_size = avio_size(pb);
-        if (ffm->write_index)
-            adjust_write_index(s);
-    } else {
-        ffm->file_size = (UINT64_C(1) << 63) - 1;
-    }
-
-    nb_streams = avio_rb32(pb);
-    avio_rb32(pb); /* total bitrate */
-    /* read each stream */
-    for(i=0;i<nb_streams;i++) {
-        char rc_eq_buf[128];
-
-        st = avformat_new_stream(s, NULL);
-        if (!st)
-            goto fail;
-
-        avpriv_set_pts_info(st, 64, 1, 1000000);
-
-        codec = st->codec;
-        /* generic info */
-        codec->codec_id = avio_rb32(pb);
-        codec->codec_type = avio_r8(pb); /* codec_type */
-        codec->bit_rate = avio_rb32(pb);
-        codec->flags = avio_rb32(pb);
-        codec->flags2 = avio_rb32(pb);
-        codec->debug = avio_rb32(pb);
-        /* specific info */
-        switch(codec->codec_type) {
-        case AVMEDIA_TYPE_VIDEO:
-            codec->time_base.num = avio_rb32(pb);
-            codec->time_base.den = avio_rb32(pb);
-            codec->width = avio_rb16(pb);
-            codec->height = avio_rb16(pb);
-            codec->gop_size = avio_rb16(pb);
-            codec->pix_fmt = avio_rb32(pb);
-            codec->qmin = avio_r8(pb);
-            codec->qmax = avio_r8(pb);
-            codec->max_qdiff = avio_r8(pb);
-            codec->qcompress = avio_rb16(pb) / 10000.0;
-            codec->qblur = avio_rb16(pb) / 10000.0;
-            codec->bit_rate_tolerance = avio_rb32(pb);
-            avio_get_str(pb, INT_MAX, rc_eq_buf, sizeof(rc_eq_buf));
-            codec->rc_eq = av_strdup(rc_eq_buf);
-            codec->rc_max_rate = avio_rb32(pb);
-            codec->rc_min_rate = avio_rb32(pb);
-            codec->rc_buffer_size = avio_rb32(pb);
-            codec->i_quant_factor = av_int2double(avio_rb64(pb));
-            codec->b_quant_factor = av_int2double(avio_rb64(pb));
-            codec->i_quant_offset = av_int2double(avio_rb64(pb));
-            codec->b_quant_offset = av_int2double(avio_rb64(pb));
-            codec->dct_algo = avio_rb32(pb);
-            codec->strict_std_compliance = avio_rb32(pb);
-            codec->max_b_frames = avio_rb32(pb);
-            codec->mpeg_quant = avio_rb32(pb);
-            codec->intra_dc_precision = avio_rb32(pb);
-            codec->me_method = avio_rb32(pb);
-            codec->mb_decision = avio_rb32(pb);
-            codec->nsse_weight = avio_rb32(pb);
-            codec->frame_skip_cmp = avio_rb32(pb);
-            codec->rc_buffer_aggressivity = av_int2double(avio_rb64(pb));
-            codec->codec_tag = avio_rb32(pb);
-            codec->thread_count = avio_r8(pb);
-            codec->coder_type = avio_rb32(pb);
-            codec->me_cmp = avio_rb32(pb);
-            codec->me_subpel_quality = avio_rb32(pb);
-            codec->me_range = avio_rb32(pb);
-            codec->keyint_min = avio_rb32(pb);
-            codec->scenechange_threshold = avio_rb32(pb);
-            codec->b_frame_strategy = avio_rb32(pb);
-            codec->qcompress = av_int2double(avio_rb64(pb));
-            codec->qblur = av_int2double(avio_rb64(pb));
-            codec->max_qdiff = avio_rb32(pb);
-            codec->refs = avio_rb32(pb);
-            break;
-        case AVMEDIA_TYPE_AUDIO:
-            codec->sample_rate = avio_rb32(pb);
-            codec->channels = avio_rl16(pb);
-            codec->frame_size = avio_rl16(pb);
-            break;
-        default:
-            goto fail;
-        }
-        if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) {
-            codec->extradata_size = avio_rb32(pb);
-            codec->extradata = av_malloc(codec->extradata_size);
-            if (!codec->extradata)
-                return AVERROR(ENOMEM);
-            avio_read(pb, codec->extradata, codec->extradata_size);
-        }
-    }
-
-    /* get until end of block reached */
-    while ((avio_tell(pb) % ffm->packet_size) != 0)
-        avio_r8(pb);
-
-    /* init packet demux */
-    ffm->packet_ptr = ffm->packet;
-    ffm->packet_end = ffm->packet;
-    ffm->frame_offset = 0;
-    ffm->dts = 0;
-    ffm->read_state = READ_HEADER;
-    ffm->first_packet = 1;
-    return 0;
- fail:
-    ffm_close(s);
-    return -1;
-}
-
-/* return < 0 if eof */
-static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
-    int size;
-    FFMContext *ffm = s->priv_data;
-    int duration, ret;
-
-    switch(ffm->read_state) {
-    case READ_HEADER:
-        if ((ret = ffm_is_avail_data(s, FRAME_HEADER_SIZE+4)) < 0)
-            return ret;
-
-        av_dlog(s, "pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
-               avio_tell(s->pb), s->pb->pos, ffm->write_index, ffm->file_size);
-        if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) !=
-            FRAME_HEADER_SIZE)
-            return -1;
-        if (ffm->header[1] & FLAG_DTS)
-            if (ffm_read_data(s, ffm->header+16, 4, 1) != 4)
-                return -1;
-        ffm->read_state = READ_DATA;
-        /* fall thru */
-    case READ_DATA:
-        size = AV_RB24(ffm->header + 2);
-        if ((ret = ffm_is_avail_data(s, size)) < 0)
-            return ret;
-
-        duration = AV_RB24(ffm->header + 5);
-
-        av_new_packet(pkt, size);
-        pkt->stream_index = ffm->header[0];
-        if ((unsigned)pkt->stream_index >= s->nb_streams) {
-            av_log(s, AV_LOG_ERROR, "invalid stream index %d\n", pkt->stream_index);
-            av_free_packet(pkt);
-            ffm->read_state = READ_HEADER;
-            return -1;
-        }
-        pkt->pos = avio_tell(s->pb);
-        if (ffm->header[1] & FLAG_KEY_FRAME)
-            pkt->flags |= AV_PKT_FLAG_KEY;
-
-        ffm->read_state = READ_HEADER;
-        if (ffm_read_data(s, pkt->data, size, 0) != size) {
-            /* bad case: desynchronized packet. we cancel all the packet loading */
-            av_free_packet(pkt);
-            return -1;
-        }
-        pkt->pts = AV_RB64(ffm->header+8);
-        if (ffm->header[1] & FLAG_DTS)
-            pkt->dts = pkt->pts - AV_RB32(ffm->header+16);
-        else
-            pkt->dts = pkt->pts;
-        pkt->duration = duration;
-        break;
-    }
-    return 0;
-}
-
-/* seek to a given time in the file. The file read pointer is
-   positioned at or before pts. XXX: the following code is quite
-   approximative */
-static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, int flags)
-{
-    FFMContext *ffm = s->priv_data;
-    int64_t pos_min, pos_max, pos;
-    int64_t pts_min, pts_max, pts;
-    double pos1;
-
-    av_dlog(s, "wanted_pts=%0.6f\n", wanted_pts / 1000000.0);
-    /* find the position using linear interpolation (better than
-       dichotomy in typical cases) */
-    pos_min = FFM_PACKET_SIZE;
-    pos_max = ffm->file_size - FFM_PACKET_SIZE;
-    while (pos_min <= pos_max) {
-        pts_min = get_dts(s, pos_min);
-        pts_max = get_dts(s, pos_max);
-        /* linear interpolation */
-        pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) /
-            (double)(pts_max - pts_min);
-        pos = (((int64_t)pos1) / FFM_PACKET_SIZE) * FFM_PACKET_SIZE;
-        if (pos <= pos_min)
-            pos = pos_min;
-        else if (pos >= pos_max)
-            pos = pos_max;
-        pts = get_dts(s, pos);
-        /* check if we are lucky */
-        if (pts == wanted_pts) {
-            goto found;
-        } else if (pts > wanted_pts) {
-            pos_max = pos - FFM_PACKET_SIZE;
-        } else {
-            pos_min = pos + FFM_PACKET_SIZE;
-        }
-    }
-    pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
-
- found:
-    if (ffm_seek1(s, pos) < 0)
-        return -1;
-
-    /* reset read state */
-    ffm->read_state = READ_HEADER;
-    ffm->packet_ptr = ffm->packet;
-    ffm->packet_end = ffm->packet;
-    ffm->first_packet = 1;
-
-    return 0;
-}
-
-static int ffm_probe(AVProbeData *p)
-{
-    if (
-        p->buf[0] == 'F' && p->buf[1] == 'F' && p->buf[2] == 'M' &&
-        p->buf[3] == '1')
-        return AVPROBE_SCORE_MAX + 1;
-    return 0;
-}
-
-AVInputFormat ff_ffm_demuxer = {
-    .name           = "ffm",
-    .long_name      = NULL_IF_CONFIG_SMALL("FFM (AVserver live feed)"),
-    .priv_data_size = sizeof(FFMContext),
-    .read_probe     = ffm_probe,
-    .read_header    = ffm_read_header,
-    .read_packet    = ffm_read_packet,
-    .read_close     = ffm_close,
-    .read_seek      = ffm_seek,
-};