sound/usb/format.c

20 #include "format.h"
23  * parse the audio format type I descriptor
24  * and returns the corresponding pcm format
28  * @format: the format tag (wFormatTag)
29  * @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3)
33 				     u64 format, void *_fmt)
42 		if (format >= 64) {
44 				       "%u:%d: invalid format type 0x%llx is detected, processed as PCM\n",
45 				       fp->iface, fp->altsetting, format);
46 			format = UAC_FORMAT_TYPE_I_PCM;
50 		format = 1ULL << format;
59 		if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) {
65 		format <<= 1;
74 		if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
77 		format <<= 1;
85 	    (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) {
87 		usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
89 		format = 1 << UAC_FORMAT_TYPE_I_PCM;
91 	if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
103 		/* check the format byte size */
131 	if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
132 		/* Dallas DS4201 workaround: it advertises U8 format, but really
139 	if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
142 	if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
145 	if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
148 	if (format & ~0x3f) {
150 			 "%u:%d : unsupported format bits %#llx\n",
151 			 fp->iface, fp->altsetting, format);
191  * parse the format descriptor and stores the possible sample rates
196  * @fmt: the format descriptor
541  * parse the format descriptor and stores the possible sample rates
645  * parse the format type I and III descriptors
648 				struct audioformat *fp, u64 format,
672 		/* FIXME: the format type is really IECxxx
673 		 *        but we give normal PCM format to get the existing
690 		fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
728  * parse the format type II descriptor
732 				 u64 format, void *_fmt)
736 	switch (format) {
738 		/* FIXME: there is no AC3 format defined yet */
747 			 "%u:%d : unknown format tag %#llx is detected.  processed as MPEG.\n",
748 			 fp->iface, fp->altsetting, format);
761 		usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
770 		usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
781 			       struct audioformat *fp, u64 format,
790 		err = parse_audio_format_i(chip, fp, format, fmt);
793 		err = parse_audio_format_ii(chip, fp, format, fmt);
797 			 "%u:%d : format type %d is not supported yet\n",
827 	u64 format = le64_to_cpu(as->bmFormats);
831 	 * Type I format bits are D0..D6
834 	if (format & 0x7f)
839 	err = parse_audio_format_i(chip, fp, format, as);