[FFmpeg-cvslog] lavd/alsa: implement get_device_list callbacks
Lukasz Marek
git at videolan.org
Sat Nov 1 01:07:22 CET 2014
ffmpeg | branch: master | Lukasz Marek <lukasz.m.luki2 at gmail.com> | Tue Aug 26 20:30:35 2014 +0200| [fe72622819d39623d87b68784dba189bfa564546] | committer: Lukasz Marek
lavd/alsa: implement get_device_list callbacks
Signed-off-by: Lukasz Marek <lukasz.m.luki2 at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fe72622819d39623d87b68784dba189bfa564546
---
libavdevice/alsa-audio-common.c | 52 +++++++++++++++++++++++++++++++++++++++
libavdevice/alsa-audio-dec.c | 6 +++++
libavdevice/alsa-audio-enc.c | 6 +++++
libavdevice/alsa-audio.h | 2 ++
4 files changed, 66 insertions(+)
diff --git a/libavdevice/alsa-audio-common.c b/libavdevice/alsa-audio-common.c
index 4e63397..749897f 100644
--- a/libavdevice/alsa-audio-common.c
+++ b/libavdevice/alsa-audio-common.c
@@ -343,3 +343,55 @@ int ff_alsa_extend_reorder_buf(AlsaData *s, int min_size)
s->reorder_buf_size = size;
return 0;
}
+
+/* ported from alsa-utils/aplay.c */
+int ff_alsa_get_device_list(AVDeviceInfoList *device_list, snd_pcm_stream_t stream_type)
+{
+ int ret = 0;
+ void **hints, **n;
+ char *name = NULL, *descr = NULL, *io = NULL, *tmp;
+ AVDeviceInfo *new_device = NULL;
+ const char *filter = stream_type == SND_PCM_STREAM_PLAYBACK ? "Output" : "Input";
+
+ if (snd_device_name_hint(-1, "pcm", &hints) < 0)
+ return AVERROR_EXTERNAL;
+ n = hints;
+ while (*n && !ret) {
+ name = snd_device_name_get_hint(*n, "NAME");
+ descr = snd_device_name_get_hint(*n, "DESC");
+ io = snd_device_name_get_hint(*n, "IOID");
+ if (!io || !strcmp(io, filter)) {
+ new_device = av_mallocz(sizeof(AVDeviceInfo));
+ if (!new_device) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ new_device->device_name = av_strdup(name);
+ if ((tmp = strrchr(descr, '\n')) && tmp[1])
+ new_device->device_description = av_strdup(&tmp[1]);
+ else
+ new_device->device_description = av_strdup(descr);
+ if (!new_device->device_description || !new_device->device_name) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ if ((ret = av_dynarray_add_nofree(&device_list->devices,
+ &device_list->nb_devices, new_device)) < 0) {
+ goto fail;
+ }
+ new_device = NULL;
+ }
+ fail:
+ free(io);
+ free(name);
+ free(descr);
+ n++;
+ }
+ if (new_device) {
+ av_free(new_device->device_description);
+ av_free(new_device->device_name);
+ av_free(new_device);
+ }
+ snd_device_name_free_hint(hints);
+ return ret;
+}
diff --git a/libavdevice/alsa-audio-dec.c b/libavdevice/alsa-audio-dec.c
index 2cdf356..7f8f8cd 100644
--- a/libavdevice/alsa-audio-dec.c
+++ b/libavdevice/alsa-audio-dec.c
@@ -132,6 +132,11 @@ static int audio_read_packet(AVFormatContext *s1, AVPacket *pkt)
return 0;
}
+static int audio_get_device_list(AVFormatContext *h, AVDeviceInfoList *device_list)
+{
+ return ff_alsa_get_device_list(device_list, SND_PCM_STREAM_CAPTURE);
+}
+
static const AVOption options[] = {
{ "sample_rate", "", offsetof(AlsaData, sample_rate), AV_OPT_TYPE_INT, {.i64 = 48000}, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ "channels", "", offsetof(AlsaData, channels), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
@@ -153,6 +158,7 @@ AVInputFormat ff_alsa_demuxer = {
.read_header = audio_read_header,
.read_packet = audio_read_packet,
.read_close = ff_alsa_close,
+ .get_device_list = audio_get_device_list,
.flags = AVFMT_NOFILE,
.priv_class = &alsa_demuxer_class,
};
diff --git a/libavdevice/alsa-audio-enc.c b/libavdevice/alsa-audio-enc.c
index e42cc8f..43d097d 100644
--- a/libavdevice/alsa-audio-enc.c
+++ b/libavdevice/alsa-audio-enc.c
@@ -142,6 +142,11 @@ audio_get_output_timestamp(AVFormatContext *s1, int stream,
*dts = s->timestamp - delay;
}
+static int audio_get_device_list(AVFormatContext *h, AVDeviceInfoList *device_list)
+{
+ return ff_alsa_get_device_list(device_list, SND_PCM_STREAM_PLAYBACK);
+}
+
static const AVClass alsa_muxer_class = {
.class_name = "ALSA muxer",
.item_name = av_default_item_name,
@@ -159,6 +164,7 @@ AVOutputFormat ff_alsa_muxer = {
.write_packet = audio_write_packet,
.write_trailer = ff_alsa_close,
.write_uncoded_frame = audio_write_frame,
+ .get_device_list = audio_get_device_list,
.get_output_timestamp = audio_get_output_timestamp,
.flags = AVFMT_NOFILE,
.priv_class = &alsa_muxer_class,
diff --git a/libavdevice/alsa-audio.h b/libavdevice/alsa-audio.h
index 583c911..cf0e942 100644
--- a/libavdevice/alsa-audio.h
+++ b/libavdevice/alsa-audio.h
@@ -99,4 +99,6 @@ int ff_alsa_xrun_recover(AVFormatContext *s1, int err);
int ff_alsa_extend_reorder_buf(AlsaData *s, int size);
+int ff_alsa_get_device_list(AVDeviceInfoList *device_list, snd_pcm_stream_t stream_type);
+
#endif /* AVDEVICE_ALSA_AUDIO_H */
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