Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Russell King | 307 | 58.14% | 1 | 16.67% |
Maxime Ripard | 136 | 25.76% | 1 | 16.67% |
Jyri Sarha | 82 | 15.53% | 2 | 33.33% |
Thomas Gleixner | 2 | 0.38% | 1 | 16.67% |
Pierre-Louis Bossart | 1 | 0.19% | 1 | 16.67% |
Total | 528 | 6 |
// SPDX-License-Identifier: GPL-2.0-only /* * PCM DRM helpers */ #include <linux/export.h> #include <linux/types.h> #include <sound/asoundef.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/pcm_iec958.h> /** * snd_pcm_create_iec958_consumer_default - create default consumer format IEC958 channel status * @cs: channel status buffer, at least four bytes * @len: length of channel status buffer * * Create the consumer format channel status data in @cs of maximum size * @len. When relevant, the configuration-dependant bits will be set as * unspecified. * * Drivers should then call einter snd_pcm_fill_iec958_consumer() or * snd_pcm_fill_iec958_consumer_hw_params() to replace these unspecified * bits by their actual values. * * Drivers may wish to tweak the contents of the buffer after creation. * * Returns: length of buffer, or negative error code if something failed. */ int snd_pcm_create_iec958_consumer_default(u8 *cs, size_t len) { if (len < 4) return -EINVAL; memset(cs, 0, len); cs[0] = IEC958_AES0_CON_NOT_COPYRIGHT | IEC958_AES0_CON_EMPHASIS_NONE; cs[1] = IEC958_AES1_CON_GENERAL; cs[2] = IEC958_AES2_CON_SOURCE_UNSPEC | IEC958_AES2_CON_CHANNEL_UNSPEC; cs[3] = IEC958_AES3_CON_CLOCK_1000PPM | IEC958_AES3_CON_FS_NOTID; if (len > 4) cs[4] = IEC958_AES4_CON_WORDLEN_NOTID; return len; } EXPORT_SYMBOL_GPL(snd_pcm_create_iec958_consumer_default); static int fill_iec958_consumer(uint rate, uint sample_width, u8 *cs, size_t len) { if (len < 4) return -EINVAL; if ((cs[3] & IEC958_AES3_CON_FS) == IEC958_AES3_CON_FS_NOTID) { unsigned int fs; switch (rate) { case 32000: fs = IEC958_AES3_CON_FS_32000; break; case 44100: fs = IEC958_AES3_CON_FS_44100; break; case 48000: fs = IEC958_AES3_CON_FS_48000; break; case 88200: fs = IEC958_AES3_CON_FS_88200; break; case 96000: fs = IEC958_AES3_CON_FS_96000; break; case 176400: fs = IEC958_AES3_CON_FS_176400; break; case 192000: fs = IEC958_AES3_CON_FS_192000; break; default: return -EINVAL; } cs[3] &= ~IEC958_AES3_CON_FS; cs[3] |= fs; } if (len > 4 && (cs[4] & IEC958_AES4_CON_WORDLEN) == IEC958_AES4_CON_WORDLEN_NOTID) { unsigned int ws; switch (sample_width) { case 16: ws = IEC958_AES4_CON_WORDLEN_20_16; break; case 18: ws = IEC958_AES4_CON_WORDLEN_22_18; break; case 20: ws = IEC958_AES4_CON_WORDLEN_20_16 | IEC958_AES4_CON_MAX_WORDLEN_24; break; case 24: case 32: /* Assume 24-bit width for 32-bit samples. */ ws = IEC958_AES4_CON_WORDLEN_24_20 | IEC958_AES4_CON_MAX_WORDLEN_24; break; default: return -EINVAL; } cs[4] &= ~IEC958_AES4_CON_WORDLEN; cs[4] |= ws; } return len; } /** * snd_pcm_fill_iec958_consumer - Fill consumer format IEC958 channel status * @runtime: pcm runtime structure with ->rate filled in * @cs: channel status buffer, at least four bytes * @len: length of channel status buffer * * Fill the unspecified bits in an IEC958 status bits array using the * parameters of the PCM runtime @runtime. * * Drivers may wish to tweak the contents of the buffer after its been * filled. * * Returns: length of buffer, or negative error code if something failed. */ int snd_pcm_fill_iec958_consumer(struct snd_pcm_runtime *runtime, u8 *cs, size_t len) { return fill_iec958_consumer(runtime->rate, snd_pcm_format_width(runtime->format), cs, len); } EXPORT_SYMBOL_GPL(snd_pcm_fill_iec958_consumer); /** * snd_pcm_fill_iec958_consumer_hw_params - Fill consumer format IEC958 channel status * @params: the hw_params instance for extracting rate and sample format * @cs: channel status buffer, at least four bytes * @len: length of channel status buffer * * Fill the unspecified bits in an IEC958 status bits array using the * parameters of the PCM hardware parameters @params. * * Drivers may wish to tweak the contents of the buffer after its been * filled.. * * Returns: length of buffer, or negative error code if something failed. */ int snd_pcm_fill_iec958_consumer_hw_params(struct snd_pcm_hw_params *params, u8 *cs, size_t len) { return fill_iec958_consumer(params_rate(params), params_width(params), cs, len); } EXPORT_SYMBOL_GPL(snd_pcm_fill_iec958_consumer_hw_params); /** * snd_pcm_create_iec958_consumer - create consumer format IEC958 channel status * @runtime: pcm runtime structure with ->rate filled in * @cs: channel status buffer, at least four bytes * @len: length of channel status buffer * * Create the consumer format channel status data in @cs of maximum size * @len corresponding to the parameters of the PCM runtime @runtime. * * Drivers may wish to tweak the contents of the buffer after creation. * * Returns: length of buffer, or negative error code if something failed. */ int snd_pcm_create_iec958_consumer(struct snd_pcm_runtime *runtime, u8 *cs, size_t len) { int ret; ret = snd_pcm_create_iec958_consumer_default(cs, len); if (ret < 0) return ret; return snd_pcm_fill_iec958_consumer(runtime, cs, len); } EXPORT_SYMBOL(snd_pcm_create_iec958_consumer); /** * snd_pcm_create_iec958_consumer_hw_params - create IEC958 channel status * @params: the hw_params instance for extracting rate and sample format * @cs: channel status buffer, at least four bytes * @len: length of channel status buffer * * Create the consumer format channel status data in @cs of maximum size * @len corresponding to the parameters of the PCM runtime @runtime. * * Drivers may wish to tweak the contents of the buffer after creation. * * Returns: length of buffer, or negative error code if something failed. */ int snd_pcm_create_iec958_consumer_hw_params(struct snd_pcm_hw_params *params, u8 *cs, size_t len) { int ret; ret = snd_pcm_create_iec958_consumer_default(cs, len); if (ret < 0) return ret; return fill_iec958_consumer(params_rate(params), params_width(params), cs, len); } EXPORT_SYMBOL(snd_pcm_create_iec958_consumer_hw_params);
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1