Remove all output devices

The libavformat API is not suitable for exporting output devices as muxers.
Some practical problems are e.g. lack of timing/synchronization mechanisms
or interaction with output-specific features.

configure

@@ -73,7 +73,6 @@ Help options:
   --list-protocols         show all available protocols
   --list-bsfs              show all available bitstream filters
   --list-indevs            show all available input devices
-  --list-outdevs           show all available output devices
   --list-filters           show all available filters
 
 Standard options:
@@ -163,9 +162,6 @@ Individual component options:
   --enable-indev=NAME      enable input device NAME
   --disable-indev=NAME     disable input device NAME
   --disable-indevs         disable input devices
-  --enable-outdev=NAME     enable output device NAME
-  --disable-outdev=NAME    disable output device NAME
-  --disable-outdevs        disable output devices
   --disable-devices        disable all devices
   --enable-filter=NAME     enable filter NAME
   --disable-filter=NAME    disable filter NAME
@@ -1224,7 +1220,6 @@ AVCODEC_COMPONENTS="
 
 AVDEVICE_COMPONENTS="
     indevs
-    outdevs
 "
 AVFILTER_COMPONENTS="
     filters
@@ -2433,9 +2428,8 @@ wtv_demuxer_select="mpegts_demuxer riffdec"
 xmv_demuxer_select="riffdec"
 xwma_demuxer_select="riffdec"
 
-# indevs / outdevs
+# indevs
 alsa_indev_deps="alsa"
-alsa_outdev_deps="alsa"
 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
@@ -2447,10 +2441,8 @@ jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
 libcdio_indev_deps="libcdio"
 libdc1394_indev_deps="libdc1394"
 oss_indev_deps_any="sys_soundcard_h"
-oss_outdev_deps_any="sys_soundcard_h"
 pulse_indev_deps="libpulse"
 sndio_indev_deps="sndio"
-sndio_outdev_deps="sndio"
 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
 vfwcap_indev_deps="vfw32 vfwcap_defines"
 xcbgrab_indev_deps="libxcb libxcb_shape"
@@ -2715,7 +2707,6 @@ HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
-OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
 
@@ -2739,7 +2730,6 @@ AVCODEC_COMPONENTS_LIST="
 
 AVDEVICE_COMPONENTS_LIST="
     $INDEV_LIST
-    $OUTDEV_LIST
 "
 
 AVFILTER_COMPONENTS_LIST="
@@ -2800,7 +2790,7 @@ for opt do
             add_extralibs $optval
         ;;
         --disable-devices)
-            disable $INDEV_LIST $OUTDEV_LIST
+            disable $INDEV_LIST
         ;;
         --enable-debug=*)
             debuglevel="$optval"
@@ -3906,7 +3896,6 @@ case $target_os in
     netbsd)
         disable symver
         oss_indev_extralibs="-lossaudio"
-        oss_outdev_extralibs="-lossaudio"
         ;;
     openbsd|bitrig)
         disable symver
@@ -3914,7 +3903,6 @@ case $target_os in
         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
         SLIB_INSTALL_LINKS=
         oss_indev_extralibs="-lossaudio"
-        oss_outdev_extralibs="-lossaudio"
         ;;
     dragonfly)
         disable symver
@@ -4789,13 +4777,13 @@ check_header "dev/bktr/ioctl_meteor.h dev/bktr/ioctl_bt848.h"
 
 check_header sys/soundcard.h
 
-enabled_any alsa_indev alsa_outdev &&
+enabled alsa_indev &&
     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
 
 enabled libjack &&
     require_pkg_config libjack jack jack/jack.h jack_port_get_latency_range
 
-enabled_any sndio_indev sndio_outdev && check_lib sndio sndio.h sio_open -lsndio
+enabled sndio_indev && check_lib sndio sndio.h sio_open -lsndio
 
 if enabled libcdio; then
     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
@@ -5252,7 +5240,7 @@ echo "Programs:"
 print_enabled '' $PROGRAM_LIST | print_3_columns
 echo
 
-for type in decoder encoder hwaccel parser demuxer muxer protocol filter bsf indev outdev; do
+for type in decoder encoder hwaccel parser demuxer muxer protocol filter bsf indev; do
     echo "Enabled ${type}s:"
     eval list=\$$(toupper $type)_LIST
     print_enabled '_*' $list | print_3_columns

doc/avconv.texi

@@ -1264,7 +1264,6 @@ avconv -i src.ext -lmax 21*QP2LAMBDA dst.ext
 @include demuxers.texi
 @include muxers.texi
 @include indevs.texi
-@include outdevs.texi
 @include protocols.texi
 @include bitstream_filters.texi
 @include filters.texi

doc/avplay.texi

@@ -164,7 +164,6 @@ Seek to percentage in file corresponding to fraction of width.
 @include demuxers.texi
 @include muxers.texi
 @include indevs.texi
-@include outdevs.texi
 @include protocols.texi
 @include filters.texi
 

doc/outdevs.texi

-@chapter Output Devices
-@c man begin OUTPUT DEVICES
-
-Output devices are configured elements in Libav which allow to write
-multimedia data to an output device attached to your system.
-
-When you configure your Libav build, all the supported output devices
-are enabled by default. You can list all available ones using the
-configure option "--list-outdevs".
-
-You can disable all the output devices using the configure option
-"--disable-outdevs", and selectively enable an output device using the
-option "--enable-outdev=@var{OUTDEV}", or you can disable a particular
-input device using the option "--disable-outdev=@var{OUTDEV}".
-
-The option "-formats" of the av* tools will display the list of
-enabled output devices (amongst the muxers).
-
-A description of the currently available output devices follows.
-
-@section alsa
-
-ALSA (Advanced Linux Sound Architecture) output device.
-
-@section oss
-
-OSS (Open Sound System) output device.
-
-@section sndio
-
-sndio audio output device.
-
-@c man end OUTPUT DEVICES

libavdevice/Makefile

@@ -9,19 +9,16 @@ OBJS    = alldevices.o                                                  \
 
 OBJS-$(HAVE_LIBC_MSVCRT)                 += file_open.o
 
-# input/output devices
+# input devices
 OBJS-$(CONFIG_ALSA_INDEV)                += alsa_dec.o alsa.o
-OBJS-$(CONFIG_ALSA_OUTDEV)               += alsa_enc.o alsa.o
 OBJS-$(CONFIG_AVFOUNDATION_INDEV)        += avfoundation_dec.o
 OBJS-$(CONFIG_BKTR_INDEV)                += bktr.o
 OBJS-$(CONFIG_DV1394_INDEV)              += dv1394.o
 OBJS-$(CONFIG_FBDEV_INDEV)               += fbdev.o
 OBJS-$(CONFIG_JACK_INDEV)                += jack.o timefilter.o
 OBJS-$(CONFIG_OSS_INDEV)                 += oss_dec.o oss.o
-OBJS-$(CONFIG_OSS_OUTDEV)                += oss_enc.o oss.o
 OBJS-$(CONFIG_PULSE_INDEV)               += pulse.o
 OBJS-$(CONFIG_SNDIO_INDEV)               += sndio_dec.o sndio.o
-OBJS-$(CONFIG_SNDIO_OUTDEV)              += sndio_enc.o sndio.o
 OBJS-$(CONFIG_V4L2_INDEV)                += v4l2.o
 OBJS-$(CONFIG_VFWCAP_INDEV)              += vfwcap.o
 OBJS-$(CONFIG_XCBGRAB_INDEV)             += xcbgrab.o

libavdevice/alldevices.c

@@ -22,13 +22,6 @@
 #include "libavformat/avformat.h"
 #include "avdevice.h"
 
-#define REGISTER_OUTDEV(X, x)                                           \
-    {                                                                   \
-        extern AVOutputFormat ff_##x##_muxer;                           \
-        if (CONFIG_##X##_OUTDEV)                                        \
-            av_register_output_format(&ff_##x##_muxer);                 \
-    }
-
 #define REGISTER_INDEV(X, x)                                            \
     {                                                                   \
         extern AVInputFormat ff_##x##_demuxer;                          \
@@ -36,8 +29,6 @@
             av_register_input_format(&ff_##x##_demuxer);                \
     }
 
-#define REGISTER_INOUTDEV(X, x) REGISTER_OUTDEV(X, x); REGISTER_INDEV(X, x)
-
 void avdevice_register_all(void)
 {
     static int initialized;
@@ -46,21 +37,21 @@ void avdevice_register_all(void)
         return;
     initialized = 1;
 
-    /* devices */
-    REGISTER_INOUTDEV(ALSA,             alsa);
-    REGISTER_INDEV   (AVFOUNDATION,     avfoundation);
-    REGISTER_INDEV   (BKTR,             bktr);
-    REGISTER_INDEV   (DV1394,           dv1394);
-    REGISTER_INDEV   (FBDEV,            fbdev);
-    REGISTER_INDEV   (JACK,             jack);
-    REGISTER_INOUTDEV(OSS,              oss);
-    REGISTER_INDEV   (PULSE,            pulse);
-    REGISTER_INOUTDEV(SNDIO,            sndio);
-    REGISTER_INDEV   (V4L2,             v4l2);
-    REGISTER_INDEV   (VFWCAP,           vfwcap);
-    REGISTER_INDEV   (XCBGRAB,          xcbgrab);
+    /* input devices */
+    REGISTER_INDEV(ALSA,             alsa);
+    REGISTER_INDEV(AVFOUNDATION,     avfoundation);
+    REGISTER_INDEV(BKTR,             bktr);
+    REGISTER_INDEV(DV1394,           dv1394);
+    REGISTER_INDEV(FBDEV,            fbdev);
+    REGISTER_INDEV(JACK,             jack);
+    REGISTER_INDEV(OSS,              oss);
+    REGISTER_INDEV(PULSE,            pulse);
+    REGISTER_INDEV(SNDIO,            sndio);
+    REGISTER_INDEV(V4L2,             v4l2);
+    REGISTER_INDEV(VFWCAP,           vfwcap);
+    REGISTER_INDEV(XCBGRAB,          xcbgrab);
 
     /* external libraries */
-    REGISTER_INDEV   (LIBCDIO,          libcdio);
-    REGISTER_INDEV   (LIBDC1394,        libdc1394);
+    REGISTER_INDEV(LIBCDIO,          libcdio);
+    REGISTER_INDEV(LIBDC1394,        libdc1394);
 }

libavdevice/alsa.c

@@ -344,19 +344,3 @@ int ff_alsa_xrun_recover(AVFormatContext *s1, int err)
     }
     return err;
 }
-
-int ff_alsa_extend_reorder_buf(AlsaData *s, int min_size)
-{
-    int size = s->reorder_buf_size;
-    void *r;
-
-    av_assert0(size != 0);
-    while (size < min_size)
-        size *= 2;
-    r = av_realloc(s->reorder_buf, size * s->frame_size);
-    if (!r)
-        return AVERROR(ENOMEM);
-    s->reorder_buf = r;
-    s->reorder_buf_size = size;
-    return 0;
-}

libavdevice/alsa.h

@@ -91,6 +91,4 @@ int ff_alsa_close(AVFormatContext *s1);
  */
 int ff_alsa_xrun_recover(AVFormatContext *s1, int err);
 
-int ff_alsa_extend_reorder_buf(AlsaData *s, int size);
-
 #endif /* AVDEVICE_ALSA_H */

libavdevice/alsa_enc.c

-/*
- * ALSA input and output
- * Copyright (c) 2007 Luca Abeni ( lucabe72 email it )
- * Copyright (c) 2007 Benoit Fouet ( benoit fouet free fr )
- *
- * 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
- */
-
-/**
- * @file
- * ALSA input and output: output
- * @author Luca Abeni ( lucabe72 email it )
- * @author Benoit Fouet ( benoit fouet free fr )
- *
- * This avdevice encoder allows to play audio to an ALSA (Advanced Linux
- * Sound Architecture) device.
- *
- * The filename parameter is the name of an ALSA PCM device capable of
- * capture, for example "default" or "plughw:1"; see the ALSA documentation
- * for naming conventions. The empty string is equivalent to "default".
- *
- * The playback period is set to the lower value available for the device,
- * which gives a low latency suitable for real-time playback.
- */
-
-#include <alsa/asoundlib.h>
-
-#include "libavutil/internal.h"
-
-#include "libavformat/avformat.h"
-
-#include "alsa.h"
-
-static av_cold int audio_write_header(AVFormatContext *s1)
-{
-    AlsaData *s = s1->priv_data;
-    AVStream *st;
-    unsigned int sample_rate;
-    enum AVCodecID codec_id;
-    int res;
-
-    st = s1->streams[0];
-    sample_rate = st->codecpar->sample_rate;
-    codec_id    = st->codecpar->codec_id;
-    res = ff_alsa_open(s1, SND_PCM_STREAM_PLAYBACK, &sample_rate,
-        st->codecpar->channels, &codec_id);
-    if (sample_rate != st->codecpar->sample_rate) {
-        av_log(s1, AV_LOG_ERROR,
-               "sample rate %d not available, nearest is %d\n",
-               st->codecpar->sample_rate, sample_rate);
-        goto fail;
-    }
-
-    return res;
-
-fail:
-    snd_pcm_close(s->h);
-    return AVERROR(EIO);
-}
-
-static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
-{
-    AlsaData *s = s1->priv_data;
-    int res;
-    int size     = pkt->size;
-    uint8_t *buf = pkt->data;
-
-    size /= s->frame_size;
-    if (s->reorder_func) {
-        if (size > s->reorder_buf_size)
-            if (ff_alsa_extend_reorder_buf(s, size))
-                return AVERROR(ENOMEM);
-        s->reorder_func(buf, s->reorder_buf, size);
-        buf = s->reorder_buf;
-    }
-    while ((res = snd_pcm_writei(s->h, buf, size)) < 0) {
-        if (res == -EAGAIN) {
-
-            return AVERROR(EAGAIN);
-        }
-
-        if (ff_alsa_xrun_recover(s1, res) < 0) {
-            av_log(s1, AV_LOG_ERROR, "ALSA write error: %s\n",
-                   snd_strerror(res));
-
-            return AVERROR(EIO);
-        }
-    }
-
-    return 0;
-}
-
-AVOutputFormat ff_alsa_muxer = {
-    .name           = "alsa",
-    .long_name      = NULL_IF_CONFIG_SMALL("ALSA audio output"),
-    .priv_data_size = sizeof(AlsaData),
-    .audio_codec    = DEFAULT_CODEC_ID,
-    .video_codec    = AV_CODEC_ID_NONE,
-    .write_header   = audio_write_header,
-    .write_packet   = audio_write_packet,
-    .write_trailer  = ff_alsa_close,
-    .flags          = AVFMT_NOFILE,
-};

libavdevice/oss_enc.c

-/*
- * Linux audio grab interface
- * Copyright (c) 2000, 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 "config.h"
-
-#if HAVE_SOUNDCARD_H
-#include <soundcard.h>
-#else
-#include <sys/soundcard.h>
-#endif
-
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-
-#include "libavutil/internal.h"
-
-#include "libavcodec/avcodec.h"
-
-#include "libavformat/avformat.h"
-#include "libavformat/internal.h"
-
-#include "oss.h"
-
-static int audio_write_header(AVFormatContext *s1)
-{
-    OSSAudioData *s = s1->priv_data;
-    AVStream *st;
-    int ret;
-
-    st = s1->streams[0];
-    s->sample_rate = st->codecpar->sample_rate;
-    s->channels = st->codecpar->channels;
-    ret = ff_oss_audio_open(s1, 1, s1->filename);
-    if (ret < 0) {
-        return AVERROR(EIO);
-    } else {
-        return 0;
-    }
-}
-
-static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
-{
-    OSSAudioData *s = s1->priv_data;
-    int len, ret;
-    int size= pkt->size;
-    uint8_t *buf= pkt->data;
-
-    while (size > 0) {
-        len = FFMIN(OSS_AUDIO_BLOCK_SIZE - s->buffer_ptr, size);
-        memcpy(s->buffer + s->buffer_ptr, buf, len);
-        s->buffer_ptr += len;
-        if (s->buffer_ptr >= OSS_AUDIO_BLOCK_SIZE) {
-            for(;;) {
-                ret = write(s->fd, s->buffer, OSS_AUDIO_BLOCK_SIZE);
-                if (ret > 0)
-                    break;
-                if (ret < 0 && (errno != EAGAIN && errno != EINTR))
-                    return AVERROR(EIO);
-            }
-            s->buffer_ptr = 0;
-        }
-        buf += len;
-        size -= len;
-    }
-    return 0;
-}
-
-static int audio_write_trailer(AVFormatContext *s1)
-{
-    OSSAudioData *s = s1->priv_data;
-
-    ff_oss_audio_close(s);
-    return 0;
-}
-
-AVOutputFormat ff_oss_muxer = {
-    .name           = "oss",
-    .long_name      = NULL_IF_CONFIG_SMALL("OSS (Open Sound System) playback"),
-    .priv_data_size = sizeof(OSSAudioData),
-    /* XXX: we make the assumption that the soundcard accepts this format */
-    /* XXX: find better solution with "preinit" method, needed also in
-       other formats */
-    .audio_codec    = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
-    .video_codec    = AV_CODEC_ID_NONE,
-    .write_header   = audio_write_header,
-    .write_packet   = audio_write_packet,
-    .write_trailer  = audio_write_trailer,
-    .flags          = AVFMT_NOFILE,
-};

libavdevice/sndio_enc.c

-/*
- * sndio play and grab interface
- * Copyright (c) 2010 Jacob Meuser
- *
- * 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 <sndio.h>
-
-#include "libavutil/internal.h"
-
-#include "libavformat/avformat.h"
-
-#include "libavdevice/sndio.h"
-
-static av_cold int audio_write_header(AVFormatContext *s1)
-{
-    SndioData *s = s1->priv_data;
-    AVStream *st;
-    int ret;
-
-    st             = s1->streams[0];
-    s->sample_rate = st->codecpar->sample_rate;
-    s->channels    = st->codecpar->channels;
-
-    ret = ff_sndio_open(s1, 1, s1->filename);
-
-    return ret;
-}
-
-static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
-{
-    SndioData *s = s1->priv_data;
-    uint8_t *buf= pkt->data;
-    int size = pkt->size;
-    int len, ret;
-
-    while (size > 0) {
-        len = FFMIN(s->buffer_size - s->buffer_offset, size);
-        memcpy(s->buffer + s->buffer_offset, buf, len);
-        buf  += len;
-        size -= len;
-        s->buffer_offset += len;
-        if (s->buffer_offset >= s->buffer_size) {
-            ret = sio_write(s->hdl, s->buffer, s->buffer_size);
-            if (ret == 0 || sio_eof(s->hdl))
-                return AVERROR(EIO);
-            s->softpos      += ret;
-            s->buffer_offset = 0;
-        }
-    }
-
-    return 0;
-}
-
-static int audio_write_trailer(AVFormatContext *s1)
-{
-    SndioData *s = s1->priv_data;
-
-    sio_write(s->hdl, s->buffer, s->buffer_offset);
-
-    ff_sndio_close(s);
-
-    return 0;
-}
-
-AVOutputFormat ff_sndio_muxer = {
-    .name           = "sndio",
-    .long_name      = NULL_IF_CONFIG_SMALL("sndio audio playback"),
-    .priv_data_size = sizeof(SndioData),
-    /* XXX: we make the assumption that the soundcard accepts this format */
-    /* XXX: find better solution with "preinit" method, needed also in
-       other formats */
-    .audio_codec    = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
-    .video_codec    = AV_CODEC_ID_NONE,
-    .write_header   = audio_write_header,
-    .write_packet   = audio_write_packet,
-    .write_trailer  = audio_write_trailer,
-    .flags          = AVFMT_NOFILE,
-};

libavdevice/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVDEVICE_VERSION_MAJOR 57
 #define LIBAVDEVICE_VERSION_MINOR  0
-#define LIBAVDEVICE_VERSION_MICRO  0
+#define LIBAVDEVICE_VERSION_MICRO  1
 
 #define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
                                                LIBAVDEVICE_VERSION_MINOR, \