diff options
Diffstat (limited to 'libavdevice/alsa-audio-common.c')
| -rw-r--r-- | libavdevice/alsa-audio-common.c | 169 |
1 files changed, 165 insertions, 4 deletions
diff --git a/libavdevice/alsa-audio-common.c b/libavdevice/alsa-audio-common.c index ff6c9f875d..c00e973e1a 100644 --- a/libavdevice/alsa-audio-common.c +++ b/libavdevice/alsa-audio-common.c @@ -3,20 +3,20 @@ * Copyright (c) 2007 Luca Abeni ( lucabe72 email it ) * Copyright (c) 2007 Benoit Fouet ( benoit fouet free fr ) * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -36,13 +36,137 @@ static av_cold snd_pcm_format_t codec_id_to_pcm_format(int codec_id) { switch(codec_id) { + case CODEC_ID_PCM_F64LE: return SND_PCM_FORMAT_FLOAT64_LE; + case CODEC_ID_PCM_F64BE: return SND_PCM_FORMAT_FLOAT64_BE; + case CODEC_ID_PCM_F32LE: return SND_PCM_FORMAT_FLOAT_LE; + case CODEC_ID_PCM_F32BE: return SND_PCM_FORMAT_FLOAT_BE; + case CODEC_ID_PCM_S32LE: return SND_PCM_FORMAT_S32_LE; + case CODEC_ID_PCM_S32BE: return SND_PCM_FORMAT_S32_BE; + case CODEC_ID_PCM_U32LE: return SND_PCM_FORMAT_U32_LE; + case CODEC_ID_PCM_U32BE: return SND_PCM_FORMAT_U32_BE; + case CODEC_ID_PCM_S24LE: return SND_PCM_FORMAT_S24_3LE; + case CODEC_ID_PCM_S24BE: return SND_PCM_FORMAT_S24_3BE; + case CODEC_ID_PCM_U24LE: return SND_PCM_FORMAT_U24_3LE; + case CODEC_ID_PCM_U24BE: return SND_PCM_FORMAT_U24_3BE; case CODEC_ID_PCM_S16LE: return SND_PCM_FORMAT_S16_LE; case CODEC_ID_PCM_S16BE: return SND_PCM_FORMAT_S16_BE; + case CODEC_ID_PCM_U16LE: return SND_PCM_FORMAT_U16_LE; + case CODEC_ID_PCM_U16BE: return SND_PCM_FORMAT_U16_BE; case CODEC_ID_PCM_S8: return SND_PCM_FORMAT_S8; + case CODEC_ID_PCM_U8: return SND_PCM_FORMAT_U8; + case CODEC_ID_PCM_MULAW: return SND_PCM_FORMAT_MU_LAW; + case CODEC_ID_PCM_ALAW: return SND_PCM_FORMAT_A_LAW; default: return SND_PCM_FORMAT_UNKNOWN; } } +#define REORDER_OUT_50(NAME, TYPE) \ +static void alsa_reorder_ ## NAME ## _out_50(const void *in_v, void *out_v, int n) \ +{ \ + const TYPE *in = in_v; \ + TYPE * out = out_v; \ +\ + while (n-- > 0) { \ + out[0] = in[0]; \ + out[1] = in[1]; \ + out[2] = in[3]; \ + out[3] = in[4]; \ + out[4] = in[2]; \ + in += 5; \ + out += 5; \ + } \ +} + +#define REORDER_OUT_51(NAME, TYPE) \ +static void alsa_reorder_ ## NAME ## _out_51(const void *in_v, void *out_v, int n) \ +{ \ + const TYPE *in = in_v; \ + TYPE * out = out_v; \ +\ + while (n-- > 0) { \ + out[0] = in[0]; \ + out[1] = in[1]; \ + out[2] = in[4]; \ + out[3] = in[5]; \ + out[4] = in[2]; \ + out[5] = in[3]; \ + in += 6; \ + out += 6; \ + } \ +} + +#define REORDER_OUT_71(NAME, TYPE) \ +static void alsa_reorder_ ## NAME ## _out_71(const void *in_v, void *out_v, int n) \ +{ \ + const TYPE *in = in_v; \ + TYPE * out = out_v; \ +\ + while (n-- > 0) { \ + out[0] = in[0]; \ + out[1] = in[1]; \ + out[2] = in[4]; \ + out[3] = in[5]; \ + out[4] = in[2]; \ + out[5] = in[3]; \ + out[6] = in[6]; \ + out[7] = in[7]; \ + in += 8; \ + out += 8; \ + } \ +} + +REORDER_OUT_50(int16, int16_t) +REORDER_OUT_51(int16, int16_t) +REORDER_OUT_71(int16, int16_t) +REORDER_OUT_50(int32, int32_t) +REORDER_OUT_51(int32, int32_t) +REORDER_OUT_71(int32, int32_t) +REORDER_OUT_50(f32, float) +REORDER_OUT_51(f32, float) +REORDER_OUT_71(f32, float) + +#define REORDER_DUMMY ((void *)1) + +static av_cold ff_reorder_func find_reorder_func(int codec_id, + int64_t layout, + int out) +{ + return + codec_id == CODEC_ID_PCM_U16LE || codec_id == CODEC_ID_PCM_U16BE || + codec_id == CODEC_ID_PCM_S16LE || codec_id == CODEC_ID_PCM_S16BE ? + layout == AV_CH_LAYOUT_QUAD || layout == AV_CH_LAYOUT_2_2 ? + REORDER_DUMMY : + layout == AV_CH_LAYOUT_5POINT0_BACK || layout == AV_CH_LAYOUT_5POINT0 ? + out ? alsa_reorder_int16_out_50 : NULL : + layout == AV_CH_LAYOUT_5POINT1_BACK || layout == AV_CH_LAYOUT_5POINT1 ? + out ? alsa_reorder_int16_out_51 : NULL : + layout == AV_CH_LAYOUT_7POINT1 ? + out ? alsa_reorder_int16_out_71 : NULL : + NULL : + codec_id == CODEC_ID_PCM_U32LE || codec_id == CODEC_ID_PCM_U32BE || + codec_id == CODEC_ID_PCM_S32LE || codec_id == CODEC_ID_PCM_S32BE ? + layout == AV_CH_LAYOUT_QUAD || layout == AV_CH_LAYOUT_2_2 ? + REORDER_DUMMY : + layout == AV_CH_LAYOUT_5POINT0_BACK || layout == AV_CH_LAYOUT_5POINT0 ? + out ? alsa_reorder_int32_out_50 : NULL : + layout == AV_CH_LAYOUT_5POINT1_BACK || layout == AV_CH_LAYOUT_5POINT1 ? + out ? alsa_reorder_int32_out_51 : NULL : + layout == AV_CH_LAYOUT_7POINT1 ? + out ? alsa_reorder_int32_out_71 : NULL : + NULL : + codec_id == CODEC_ID_PCM_F32LE || codec_id == CODEC_ID_PCM_F32BE ? + layout == AV_CH_LAYOUT_QUAD || layout == AV_CH_LAYOUT_2_2 ? + REORDER_DUMMY : + layout == AV_CH_LAYOUT_5POINT0_BACK || layout == AV_CH_LAYOUT_5POINT0 ? + out ? alsa_reorder_f32_out_50 : NULL : + layout == AV_CH_LAYOUT_5POINT1_BACK || layout == AV_CH_LAYOUT_5POINT1 ? + out ? alsa_reorder_f32_out_51 : NULL : + layout == AV_CH_LAYOUT_7POINT1 ? + out ? alsa_reorder_f32_out_71 : NULL : + NULL : + NULL; +} + av_cold int ff_alsa_open(AVFormatContext *ctx, snd_pcm_stream_t mode, unsigned int *sample_rate, int channels, enum CodecID *codec_id) @@ -54,6 +178,7 @@ av_cold int ff_alsa_open(AVFormatContext *ctx, snd_pcm_stream_t mode, snd_pcm_t *h; snd_pcm_hw_params_t *hw_params; snd_pcm_uframes_t buffer_size, period_size; + int64_t layout = ctx->streams[0]->codec->channel_layout; if (ctx->filename[0] == 0) audio_device = "default"; else audio_device = ctx->filename; @@ -146,6 +271,26 @@ av_cold int ff_alsa_open(AVFormatContext *ctx, snd_pcm_stream_t mode, snd_pcm_hw_params_free(hw_params); + if (channels > 2 && layout) { + s->reorder_func = find_reorder_func(*codec_id, layout, + mode == SND_PCM_STREAM_PLAYBACK); + if (s->reorder_func == REORDER_DUMMY) { + s->reorder_func = NULL; + } else if (s->reorder_func) { + s->reorder_buf_size = buffer_size; + s->reorder_buf = av_malloc(s->reorder_buf_size * s->frame_size); + if (!s->reorder_buf) + goto fail1; + } else { + char name[32]; + av_get_channel_layout_string(name, sizeof(name), channels, layout); + av_log(ctx, AV_LOG_WARNING, + "ALSA channel layout unknown or unimplemented for %s %s.\n", + name, + mode == SND_PCM_STREAM_PLAYBACK ? "playback" : "capture"); + } + } + s->h = h; return 0; @@ -160,6 +305,7 @@ av_cold int ff_alsa_close(AVFormatContext *s1) { AlsaData *s = s1->priv_data; + av_freep(&s->reorder_buf); snd_pcm_close(s->h); return 0; } @@ -184,3 +330,18 @@ 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; + + 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; +} |