ALSA: emu10k1: make struct snd_emu1010 less wasteful

Shrink the {in,out}put_source arrays and their data type to what is
actually necessary.

To be still on the safe side, add some static asserts.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230516093612.3536508-11-oswald.buddenhagen@gmx.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h
index aab45a2..5ad2144 100644 (file)
--- a/include/sound/emu10k1.h
+++ b/include/sound/emu10k1.h
@@ -1637,9 +1637,12 @@ struct snd_emu_chip_details {
        const char *id;         /* for backward compatibility - can be NULL if not needed */
 };
 
+#define NUM_OUTPUT_DESTS 28
+#define NUM_INPUT_DESTS 22
+
 struct snd_emu1010 {
-       unsigned int output_source[64];
-       unsigned int input_source[64];
+       unsigned char output_source[NUM_OUTPUT_DESTS];
+       unsigned char input_source[NUM_INPUT_DESTS];
        unsigned int adc_pads; /* bit mask */
        unsigned int dac_pads; /* bit mask */
        unsigned int internal_clock; /* 44100 or 48000 */

diff --git a/sound/pci/emu10k1/emumixer.c b/sound/pci/emu10k1/emumixer.c
index 41a1cf1..3a7f25f 100644 (file)
--- a/sound/pci/emu10k1/emumixer.c
+++ b/sound/pci/emu10k1/emumixer.c
@@ -273,6 +273,7 @@ static const char * const emu1010_output_texts[] = {
        LR_CTLS("1010 SPDIF"),
        ADAT_CTLS("1010 "),
 };
+static_assert(ARRAY_SIZE(emu1010_output_texts) <= NUM_OUTPUT_DESTS);
 
 static const unsigned short emu1010_output_dst[] = {
        LR_REGS(EMU_DST_DOCK_DAC1),
@@ -313,6 +314,7 @@ static const char * const snd_emu1010b_output_texts[] = {
        LR_CTLS("1010 SPDIF"),
        ADAT_CTLS("1010 "),
 };
+static_assert(ARRAY_SIZE(snd_emu1010b_output_texts) <= NUM_OUTPUT_DESTS);
 
 static const unsigned short emu1010b_output_dst[] = {
        LR_REGS(EMU_DST_DOCK_DAC1),
@@ -349,6 +351,7 @@ static const char * const snd_emu1616_output_texts[] = {
        ADAT_CTLS("Dock "),
        LR_CTLS("Mana DAC"),
 };
+static_assert(ARRAY_SIZE(snd_emu1616_output_texts) <= NUM_OUTPUT_DESTS);
 
 static const unsigned short emu1616_output_dst[] = {
        LR_REGS(EMU_DST_DOCK_DAC1),
@@ -377,6 +380,7 @@ static const char * const snd_emu0404_output_texts[] = {
        LR_CTLS("DAC"),
        LR_CTLS("SPDIF"),
 };
+static_assert(ARRAY_SIZE(snd_emu0404_output_texts) <= NUM_OUTPUT_DESTS);
 
 static const unsigned short emu0404_output_dst[] = {
        LR_REGS(EMU_DST_HAMOA_DAC),
@@ -421,6 +425,7 @@ static const char * const emu1010_input_texts[] = {
        "DSP 14 Capture Enum",
        "DSP 15 Capture Enum",
 };
+static_assert(ARRAY_SIZE(emu1010_input_texts) <= NUM_INPUT_DESTS);
 
 static const unsigned short emu1010_input_dst[] = {
        EMU_DST_ALICE2_EMU32_0,