static int control(struct af_instance *af, int cmd, void *arg) { struct af_resample *s = af->priv; switch (cmd) { case AF_CONTROL_REINIT: { struct mp_audio *in = arg; struct mp_audio *out = af->data; struct mp_audio orig_in = *in; if (((out->rate == in->rate) || (out->rate == 0)) && (out->format == in->format) && (mp_chmap_equals(&out->channels, &in->channels) || out->nch == 0) && s->allow_detach && s->playback_speed == 1.0) return AF_DETACH; if (out->rate == 0) out->rate = in->rate; if (mp_chmap_is_empty(&out->channels)) mp_audio_set_channels(out, &in->channels); if (af_to_avformat(in->format) == AV_SAMPLE_FMT_NONE) mp_audio_set_format(in, AF_FORMAT_FLOAT); if (check_output_conversion(out->format) == AV_SAMPLE_FMT_NONE) mp_audio_set_format(out, in->format); int r = ((in->format == orig_in.format) && mp_chmap_equals(&in->channels, &orig_in.channels)) ? AF_OK : AF_FALSE; if (r == AF_OK) r = configure_lavrr(af, in, out, true); return r; } case AF_CONTROL_SET_PLAYBACK_SPEED_RESAMPLE: { s->playback_speed = *(double *)arg; return AF_OK; } case AF_CONTROL_RESET: if (s->avrctx) { #if HAVE_LIBSWRESAMPLE swr_close(s->avrctx); if (swr_init(s->avrctx) < 0) { close_lavrr(af); return AF_ERROR; } #else while (avresample_read(s->avrctx, NULL, 1000) > 0) {} #endif } return AF_OK; } return AF_UNKNOWN; }
static int configure_lavrr(struct af_instance *af, struct mp_audio *in, struct mp_audio *out, bool verbose) { struct af_resample *s = af->priv; close_lavrr(af); s->avrctx = avresample_alloc_context(); s->avrctx_out = avresample_alloc_context(); if (!s->avrctx || !s->avrctx_out) goto error; enum AVSampleFormat in_samplefmt = af_to_avformat(in->format); enum AVSampleFormat out_samplefmt = check_output_conversion(out->format); enum AVSampleFormat out_samplefmtp = av_get_planar_sample_fmt(out_samplefmt); if (in_samplefmt == AV_SAMPLE_FMT_NONE || out_samplefmt == AV_SAMPLE_FMT_NONE || out_samplefmtp == AV_SAMPLE_FMT_NONE) goto error; s->out_rate = out->rate; s->in_rate_af = in->rate; s->in_rate = rate_from_speed(in->rate, s->playback_speed); s->out_format = out->format; s->in_format = in->format; s->out_channels= out->channels; s->in_channels = in->channels; av_opt_set_int(s->avrctx, "filter_size", s->opts.filter_size, 0); av_opt_set_int(s->avrctx, "phase_shift", s->opts.phase_shift, 0); av_opt_set_int(s->avrctx, "linear_interp", s->opts.linear, 0); av_opt_set_double(s->avrctx, "cutoff", s->opts.cutoff, 0); int normalize = s->opts.normalize; if (normalize < 0) normalize = af->opts->audio_normalize; #if HAVE_LIBSWRESAMPLE av_opt_set_double(s->avrctx, "rematrix_maxval", normalize ? 1 : 1000, 0); #else av_opt_set_int(s->avrctx, "normalize_mix_level", !!normalize, 0); #endif if (mp_set_avopts(af->log, s->avrctx, s->avopts) < 0) goto error; struct mp_chmap map_in = in->channels; struct mp_chmap map_out = out->channels; // Try not to do any remixing if at least one is "unknown". if (mp_chmap_is_unknown(&map_in) || mp_chmap_is_unknown(&map_out)) { mp_chmap_set_unknown(&map_in, map_in.num); mp_chmap_set_unknown(&map_out, map_out.num); } // unchecked: don't take any channel reordering into account uint64_t in_ch_layout = mp_chmap_to_lavc_unchecked(&map_in); uint64_t out_ch_layout = mp_chmap_to_lavc_unchecked(&map_out); struct mp_chmap in_lavc, out_lavc; mp_chmap_from_lavc(&in_lavc, in_ch_layout); mp_chmap_from_lavc(&out_lavc, out_ch_layout); if (verbose && !mp_chmap_equals(&in_lavc, &out_lavc)) { MP_VERBOSE(af, "Remix: %s -> %s\n", mp_chmap_to_str(&in_lavc), mp_chmap_to_str(&out_lavc)); } if (in_lavc.num != map_in.num) { // For handling NA channels, we would have to add a planarization step. MP_FATAL(af, "Unsupported channel remapping.\n"); goto error; } mp_chmap_get_reorder(s->reorder_in, &map_in, &in_lavc); transpose_order(s->reorder_in, map_in.num); if (mp_chmap_equals(&out_lavc, &map_out)) { // No intermediate step required - output new format directly. out_samplefmtp = out_samplefmt; } else { // Verify that we really just reorder and/or insert NA channels. struct mp_chmap withna = out_lavc; mp_chmap_fill_na(&withna, map_out.num); if (withna.num != map_out.num) goto error; } mp_chmap_get_reorder(s->reorder_out, &out_lavc, &map_out); s->avrctx_fmt = *out; mp_audio_set_channels(&s->avrctx_fmt, &out_lavc); mp_audio_set_format(&s->avrctx_fmt, af_from_avformat(out_samplefmtp)); s->pre_out_fmt = *out; mp_audio_set_format(&s->pre_out_fmt, af_from_avformat(out_samplefmt)); // If there are NA channels, the final output will have more channels than // the avrctx output. Also, avrctx will output planar (out_samplefmtp was // not overwritten). Allocate the output frame with more channels, so the // NA channels can be trivially added. s->pool_fmt = s->avrctx_fmt; if (map_out.num > out_lavc.num) mp_audio_set_channels(&s->pool_fmt, &map_out); out_ch_layout = fudge_layout_conversion(af, in_ch_layout, out_ch_layout); // Real conversion; output is input to avrctx_out. av_opt_set_int(s->avrctx, "in_channel_layout", in_ch_layout, 0); av_opt_set_int(s->avrctx, "out_channel_layout", out_ch_layout, 0); av_opt_set_int(s->avrctx, "in_sample_rate", s->in_rate, 0); av_opt_set_int(s->avrctx, "out_sample_rate", s->out_rate, 0); av_opt_set_int(s->avrctx, "in_sample_fmt", in_samplefmt, 0); av_opt_set_int(s->avrctx, "out_sample_fmt", out_samplefmtp, 0); // Just needs the correct number of channels for deplanarization. struct mp_chmap fake_chmap; mp_chmap_set_unknown(&fake_chmap, map_out.num); uint64_t fake_out_ch_layout = mp_chmap_to_lavc_unchecked(&fake_chmap); if (!fake_out_ch_layout) goto error; av_opt_set_int(s->avrctx_out, "in_channel_layout", fake_out_ch_layout, 0); av_opt_set_int(s->avrctx_out, "out_channel_layout", fake_out_ch_layout, 0); av_opt_set_int(s->avrctx_out, "in_sample_fmt", out_samplefmtp, 0); av_opt_set_int(s->avrctx_out, "out_sample_fmt", out_samplefmt, 0); av_opt_set_int(s->avrctx_out, "in_sample_rate", s->out_rate, 0); av_opt_set_int(s->avrctx_out, "out_sample_rate", s->out_rate, 0); // API has weird requirements, quoting avresample.h: // * This function can only be called when the allocated context is not open. // * Also, the input channel layout must have already been set. avresample_set_channel_mapping(s->avrctx, s->reorder_in); if (avresample_open(s->avrctx) < 0 || avresample_open(s->avrctx_out) < 0) { MP_ERR(af, "Cannot open Libavresample Context. \n"); goto error; } return AF_OK; error: close_lavrr(af); return AF_ERROR; }
bool af_lavrresample_test_conversion(int src_format, int dst_format) { return af_to_avformat(src_format) != AV_SAMPLE_FMT_NONE && check_output_conversion(dst_format) != AV_SAMPLE_FMT_NONE; }
static int control(struct af_instance *af, int cmd, void *arg) { struct af_resample *s = af->priv; switch (cmd) { case AF_CONTROL_REINIT: { struct mp_audio *in = arg; struct mp_audio *out = af->data; struct mp_audio orig_in = *in; if (((out->rate == in->rate) || (out->rate == 0)) && (out->format == in->format) && (mp_chmap_equals(&out->channels, &in->channels) || out->nch == 0) && s->allow_detach && s->playback_speed == 1.0) return AF_DETACH; if (out->rate == 0) out->rate = in->rate; if (mp_chmap_is_empty(&out->channels)) mp_audio_set_channels(out, &in->channels); if (af_to_avformat(in->format) == AV_SAMPLE_FMT_NONE) mp_audio_set_format(in, AF_FORMAT_FLOAT); if (check_output_conversion(out->format) == AV_SAMPLE_FMT_NONE) mp_audio_set_format(out, in->format); int r = ((in->format == orig_in.format) && mp_chmap_equals(&in->channels, &orig_in.channels)) ? AF_OK : AF_FALSE; if (r == AF_OK && needs_lavrctx_reconfigure(s, in, out)) r = configure_lavrr(af, in, out); return r; } case AF_CONTROL_SET_FORMAT: { int format = *(int *)arg; if (format && check_output_conversion(format) == AV_SAMPLE_FMT_NONE) return AF_FALSE; mp_audio_set_format(af->data, format); return AF_OK; } case AF_CONTROL_SET_CHANNELS: { mp_audio_set_channels(af->data, (struct mp_chmap *)arg); return AF_OK; } case AF_CONTROL_SET_RESAMPLE_RATE: af->data->rate = *(int *)arg; return AF_OK; case AF_CONTROL_SET_PLAYBACK_SPEED_RESAMPLE: { s->playback_speed = *(double *)arg; int new_rate = rate_from_speed(s->ctx.in_rate_af, s->playback_speed); if (new_rate != s->ctx.in_rate && s->avrctx && af->fmt_out.format) { // Before reconfiguring, drain the audio that is still buffered // in the resampler. af->filter_frame(af, NULL); // Reinitialize resampler. configure_lavrr(af, &af->fmt_in, &af->fmt_out); } return AF_OK; } case AF_CONTROL_RESET: if (s->avrctx) drop_all_output(s); return AF_OK; } return AF_UNKNOWN; }
static int control(struct af_instance *af, int cmd, void *arg) { struct af_resample *s = af->priv; switch (cmd) { case AF_CONTROL_REINIT: { struct mp_audio *in = arg; struct mp_audio *out = af->data; struct mp_audio orig_in = *in; if (((out->rate == in->rate) || (out->rate == 0)) && (out->format == in->format) && (mp_chmap_equals(&out->channels, &in->channels) || out->nch == 0) && s->allow_detach && s->playback_speed == 1.0) return AF_DETACH; if (out->rate == 0) out->rate = in->rate; if (mp_chmap_is_empty(&out->channels)) mp_audio_set_channels(out, &in->channels); if (af_to_avformat(in->format) == AV_SAMPLE_FMT_NONE) mp_audio_set_format(in, AF_FORMAT_FLOAT); if (check_output_conversion(out->format) == AV_SAMPLE_FMT_NONE) mp_audio_set_format(out, in->format); int r = ((in->format == orig_in.format) && mp_chmap_equals(&in->channels, &orig_in.channels)) ? AF_OK : AF_FALSE; if (r == AF_OK) r = configure_lavrr(af, in, out, true); return r; } case AF_CONTROL_SET_FORMAT: { int format = *(int *)arg; if (format && check_output_conversion(format) == AV_SAMPLE_FMT_NONE) return AF_FALSE; mp_audio_set_format(af->data, format); return AF_OK; } case AF_CONTROL_SET_CHANNELS: { mp_audio_set_channels(af->data, (struct mp_chmap *)arg); return AF_OK; } case AF_CONTROL_SET_RESAMPLE_RATE: af->data->rate = *(int *)arg; return AF_OK; case AF_CONTROL_SET_PLAYBACK_SPEED_RESAMPLE: { s->playback_speed = *(double *)arg; return AF_OK; } case AF_CONTROL_RESET: if (s->avrctx) drop_all_output(s); return AF_OK; } return AF_UNKNOWN; }