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authorMax Kellermann <max@duempel.org>2009-07-23 12:01:03 +0200
committerMax Kellermann <max@duempel.org>2009-07-23 12:01:03 +0200
commit54889c72e3469027a852d9e8ff029d659e612094 (patch)
tree19864296a3807db7b0384d8052c4b12775c33ba6 /src
parentcba126ceb8f1830614a8df04a6b4c1a45f955417 (diff)
downloadmpd-54889c72e3469027a852d9e8ff029d659e612094.tar.gz
mpd-54889c72e3469027a852d9e8ff029d659e612094.tar.xz
mpd-54889c72e3469027a852d9e8ff029d659e612094.zip
pcm_convert: use GError for error handling
Don't abort the whole MPD process when the conversion fails. This has been a denial-of-service attack vector for years.
Diffstat (limited to '')
-rw-r--r--src/decoder_api.c18
-rw-r--r--src/filter/convert_filter_plugin.c14
-rw-r--r--src/pcm_channels.c20
-rw-r--r--src/pcm_convert.c109
-rw-r--r--src/pcm_convert.h13
-rw-r--r--src/pcm_format.c5
-rw-r--r--src/pcm_resample.c18
-rw-r--r--src/pcm_resample.h16
-rw-r--r--src/pcm_resample_internal.h8
-rw-r--r--src/pcm_resample_libsamplerate.c71
10 files changed, 177 insertions, 115 deletions
diff --git a/src/decoder_api.c b/src/decoder_api.c
index 408e8005e..7f66c881e 100644
--- a/src/decoder_api.c
+++ b/src/decoder_api.c
@@ -225,6 +225,7 @@ decoder_data(struct decoder *decoder,
struct replay_gain_info *replay_gain_info)
{
const char *data = _data;
+ GError *error = NULL;
assert(dc.state == DECODE_STATE_DECODE);
assert(dc.pipe != NULL);
@@ -259,14 +260,15 @@ decoder_data(struct decoder *decoder,
if (!audio_format_equals(&dc.in_audio_format, &dc.out_audio_format)) {
data = pcm_convert(&decoder->conv_state,
&dc.in_audio_format, data, length,
- &dc.out_audio_format, &length);
-
- /* under certain circumstances, pcm_convert() may
- return an empty buffer - this condition should be
- investigated further, but for now, do this check as
- a workaround: */
- if (data == NULL)
- return DECODE_COMMAND_NONE;
+ &dc.out_audio_format, &length,
+ &error);
+ if (data == NULL) {
+ /* the PCM conversion has failed - stop
+ playback, since we have no better way to
+ bail out */
+ g_warning("%s", error->message);
+ return DECODE_COMMAND_STOP;
+ }
}
while (length > 0) {
diff --git a/src/filter/convert_filter_plugin.c b/src/filter/convert_filter_plugin.c
index b7f16de4f..d197dbdb9 100644
--- a/src/filter/convert_filter_plugin.c
+++ b/src/filter/convert_filter_plugin.c
@@ -53,12 +53,6 @@ struct convert_filter {
struct pcm_convert_state state;
};
-static inline GQuark
-convert_quark(void)
-{
- return g_quark_from_static_string("pcm_convert");
-}
-
static struct filter *
convert_filter_init(G_GNUC_UNUSED const struct config_param *param,
G_GNUC_UNUSED GError **error_r)
@@ -119,12 +113,10 @@ convert_filter_filter(struct filter *_filter, const void *src, size_t src_size,
dest = pcm_convert(&filter->state, &filter->in_audio_format,
src, src_size,
- &filter->out_audio_format, dest_size_r);
- if (dest == NULL) {
- g_set_error(error_r, convert_quark(), 0,
- "pcm_convert() has failed");
+ &filter->out_audio_format, dest_size_r,
+ error_r);
+ if (dest == NULL)
return NULL;
- }
return dest;
}
diff --git a/src/pcm_channels.c b/src/pcm_channels.c
index 4f9343912..38445f958 100644
--- a/src/pcm_channels.c
+++ b/src/pcm_channels.c
@@ -20,13 +20,8 @@
#include "pcm_channels.h"
#include "pcm_buffer.h"
-#include <glib.h>
-
#include <assert.h>
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN "pcm"
-
static void
pcm_convert_channels_16_1_to_2(int16_t *dest, const int16_t *src,
unsigned num_frames)
@@ -92,11 +87,8 @@ pcm_convert_channels_16(struct pcm_buffer *buffer,
else if (dest_channels == 2)
pcm_convert_channels_16_n_to_2(dest, src_channels, src,
num_frames);
- else {
- g_warning("conversion %u->%u channels is not supported",
- src_channels, dest_channels);
+ else
return NULL;
- }
return dest;
}
@@ -166,11 +158,8 @@ pcm_convert_channels_24(struct pcm_buffer *buffer,
else if (dest_channels == 2)
pcm_convert_channels_24_n_to_2(dest, src_channels, src,
num_frames);
- else {
- g_warning("conversion %u->%u channels is not supported",
- src_channels, dest_channels);
+ else
return NULL;
- }
return dest;
}
@@ -235,11 +224,8 @@ pcm_convert_channels_32(struct pcm_buffer *buffer,
else if (dest_channels == 2)
pcm_convert_channels_32_n_to_2(dest, src_channels, src,
num_frames);
- else {
- g_warning("conversion %u->%u channels is not supported",
- src_channels, dest_channels);
+ else
return NULL;
- }
return dest;
}
diff --git a/src/pcm_convert.c b/src/pcm_convert.c
index 8a35d807e..4879dc0ab 100644
--- a/src/pcm_convert.c
+++ b/src/pcm_convert.c
@@ -56,8 +56,8 @@ static const int16_t *
pcm_convert_16(struct pcm_convert_state *state,
const struct audio_format *src_format,
const void *src_buffer, size_t src_size,
- const struct audio_format *dest_format,
- size_t *dest_size_r)
+ const struct audio_format *dest_format, size_t *dest_size_r,
+ GError **error_r)
{
const int16_t *buf;
size_t len;
@@ -67,24 +67,37 @@ pcm_convert_16(struct pcm_convert_state *state,
buf = pcm_convert_to_16(&state->format_buffer, &state->dither,
src_format->bits, src_buffer, src_size,
&len);
- if (!buf)
- g_error("pcm_convert_to_16() failed");
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %u to 16 bit is not implemented",
+ src_format->bits);
+ return NULL;
+ }
if (src_format->channels != dest_format->channels) {
buf = pcm_convert_channels_16(&state->channels_buffer,
dest_format->channels,
src_format->channels,
buf, len, &len);
- if (!buf)
- g_error("pcm_convert_channels_16() failed");
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %u to %u channels "
+ "is not implemented",
+ src_format->channels,
+ dest_format->channels);
+ return NULL;
+ }
}
- if (src_format->sample_rate != dest_format->sample_rate)
+ if (src_format->sample_rate != dest_format->sample_rate) {
buf = pcm_resample_16(&state->resample,
dest_format->channels,
src_format->sample_rate, buf, len,
- dest_format->sample_rate,
- &len);
+ dest_format->sample_rate, &len,
+ error_r);
+ if (buf == NULL)
+ return NULL;
+ }
if (dest_format->reverse_endian) {
buf = pcm_byteswap_16(&state->byteswap_buffer, buf, len);
@@ -99,8 +112,8 @@ static const int32_t *
pcm_convert_24(struct pcm_convert_state *state,
const struct audio_format *src_format,
const void *src_buffer, size_t src_size,
- const struct audio_format *dest_format,
- size_t *dest_size_r)
+ const struct audio_format *dest_format, size_t *dest_size_r,
+ GError **error_r)
{
const int32_t *buf;
size_t len;
@@ -109,24 +122,37 @@ pcm_convert_24(struct pcm_convert_state *state,
buf = pcm_convert_to_24(&state->format_buffer, src_format->bits,
src_buffer, src_size, &len);
- if (!buf)
- g_error("pcm_convert_to_24() failed");
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %u to 24 bit is not implemented",
+ src_format->bits);
+ return NULL;
+ }
if (src_format->channels != dest_format->channels) {
buf = pcm_convert_channels_24(&state->channels_buffer,
dest_format->channels,
src_format->channels,
buf, len, &len);
- if (!buf)
- g_error("pcm_convert_channels_24() failed");
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %u to %u channels "
+ "is not implemented",
+ src_format->channels,
+ dest_format->channels);
+ return NULL;
+ }
}
- if (src_format->sample_rate != dest_format->sample_rate)
+ if (src_format->sample_rate != dest_format->sample_rate) {
buf = pcm_resample_24(&state->resample,
dest_format->channels,
src_format->sample_rate, buf, len,
- dest_format->sample_rate,
- &len);
+ dest_format->sample_rate, &len,
+ error_r);
+ if (buf == NULL)
+ return NULL;
+ }
if (dest_format->reverse_endian) {
buf = pcm_byteswap_32(&state->byteswap_buffer, buf, len);
@@ -141,8 +167,8 @@ static const int32_t *
pcm_convert_32(struct pcm_convert_state *state,
const struct audio_format *src_format,
const void *src_buffer, size_t src_size,
- const struct audio_format *dest_format,
- size_t *dest_size_r)
+ const struct audio_format *dest_format, size_t *dest_size_r,
+ GError **error_r)
{
const int32_t *buf;
size_t len;
@@ -151,24 +177,37 @@ pcm_convert_32(struct pcm_convert_state *state,
buf = pcm_convert_to_32(&state->format_buffer, src_format->bits,
src_buffer, src_size, &len);
- if (!buf)
- g_error("pcm_convert_to_32() failed");
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %u to 24 bit is not implemented",
+ src_format->bits);
+ return NULL;
+ }
if (src_format->channels != dest_format->channels) {
buf = pcm_convert_channels_32(&state->channels_buffer,
dest_format->channels,
src_format->channels,
buf, len, &len);
- if (!buf)
- g_error("pcm_convert_channels_32() failed");
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %u to %u channels "
+ "is not implemented",
+ src_format->channels,
+ dest_format->channels);
+ return NULL;
+ }
}
- if (src_format->sample_rate != dest_format->sample_rate)
+ if (src_format->sample_rate != dest_format->sample_rate) {
buf = pcm_resample_32(&state->resample,
dest_format->channels,
src_format->sample_rate, buf, len,
- dest_format->sample_rate,
- &len);
+ dest_format->sample_rate, &len,
+ error_r);
+ if (buf == NULL)
+ return buf;
+ }
if (dest_format->reverse_endian) {
buf = pcm_byteswap_32(&state->byteswap_buffer, buf, len);
@@ -184,26 +223,32 @@ pcm_convert(struct pcm_convert_state *state,
const struct audio_format *src_format,
const void *src, size_t src_size,
const struct audio_format *dest_format,
- size_t *dest_size_r)
+ size_t *dest_size_r,
+ GError **error_r)
{
switch (dest_format->bits) {
case 16:
return pcm_convert_16(state,
src_format, src, src_size,
- dest_format, dest_size_r);
+ dest_format, dest_size_r,
+ error_r);
case 24:
return pcm_convert_24(state,
src_format, src, src_size,
- dest_format, dest_size_r);
+ dest_format, dest_size_r,
+ error_r);
case 32:
return pcm_convert_32(state,
src_format, src, src_size,
- dest_format, dest_size_r);
+ dest_format, dest_size_r,
+ error_r);
default:
- g_error("cannot convert to %u bit\n", dest_format->bits);
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "PCM conversion to %u bit is not implemented",
+ dest_format->bits);
return NULL;
}
}
diff --git a/src/pcm_convert.h b/src/pcm_convert.h
index a048d6598..7ef0782df 100644
--- a/src/pcm_convert.h
+++ b/src/pcm_convert.h
@@ -46,6 +46,12 @@ struct pcm_convert_state {
struct pcm_buffer byteswap_buffer;
};
+static inline GQuark
+pcm_convert_quark(void)
+{
+ return g_quark_from_static_string("pcm_convert");
+}
+
/**
* Initializes a pcm_convert_state object.
*/
@@ -66,13 +72,16 @@ void pcm_convert_deinit(struct pcm_convert_state *state);
* @param src_size the size of #src in bytes
* @param dest_format the requested destination audio format
* @param dest_size_r returns the number of bytes of the destination buffer
- * @return the destination buffer
+ * @param error_r location to store the error occuring, or NULL to
+ * ignore errors
+ * @return the destination buffer, or NULL on error
*/
const void *
pcm_convert(struct pcm_convert_state *state,
const struct audio_format *src_format,
const void *src, size_t src_size,
const struct audio_format *dest_format,
- size_t *dest_size_r);
+ size_t *dest_size_r,
+ GError **error_r);
#endif
diff --git a/src/pcm_format.c b/src/pcm_format.c
index 0e686e17c..64e5167b5 100644
--- a/src/pcm_format.c
+++ b/src/pcm_format.c
@@ -21,8 +21,6 @@
#include "pcm_dither.h"
#include "pcm_buffer.h"
-#include <glib.h>
-
static void
pcm_convert_8_to_16(int16_t *out, const int8_t *in,
unsigned num_samples)
@@ -93,7 +91,6 @@ pcm_convert_to_16(struct pcm_buffer *buffer, struct pcm_dither *dither,
return dest;
}
- g_warning("only 8 or 16 bits are supported for conversion!\n");
return NULL;
}
@@ -168,7 +165,6 @@ pcm_convert_to_24(struct pcm_buffer *buffer,
return dest;
}
- g_warning("only 8 or 24 bits are supported for conversion!\n");
return NULL;
}
@@ -243,6 +239,5 @@ pcm_convert_to_32(struct pcm_buffer *buffer,
return src;
}
- g_warning("only 8 or 32 bits are supported for conversion!\n");
return NULL;
}
diff --git a/src/pcm_resample.c b/src/pcm_resample.c
index 1e4a95ceb..f09c65a32 100644
--- a/src/pcm_resample.c
+++ b/src/pcm_resample.c
@@ -63,14 +63,17 @@ const int16_t *
pcm_resample_16(struct pcm_resample_state *state,
uint8_t channels,
unsigned src_rate, const int16_t *src_buffer, size_t src_size,
- unsigned dest_rate,
- size_t *dest_size_r)
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r)
{
#ifdef HAVE_LIBSAMPLERATE
if (pcm_resample_lsr_enabled())
return pcm_resample_lsr_16(state, channels,
src_rate, src_buffer, src_size,
- dest_rate, dest_size_r);
+ dest_rate, dest_size_r,
+ error_r);
+#else
+ (void)error_r;
#endif
return pcm_resample_fallback_16(state, channels,
@@ -82,14 +85,17 @@ const int32_t *
pcm_resample_32(struct pcm_resample_state *state,
uint8_t channels,
unsigned src_rate, const int32_t *src_buffer, size_t src_size,
- unsigned dest_rate,
- size_t *dest_size_r)
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r)
{
#ifdef HAVE_LIBSAMPLERATE
if (pcm_resample_lsr_enabled())
return pcm_resample_lsr_32(state, channels,
src_rate, src_buffer, src_size,
- dest_rate, dest_size_r);
+ dest_rate, dest_size_r,
+ error_r);
+#else
+ (void)error_r;
#endif
return pcm_resample_fallback_32(state, channels,
diff --git a/src/pcm_resample.h b/src/pcm_resample.h
index 44720f7b2..9d03bbfbf 100644
--- a/src/pcm_resample.h
+++ b/src/pcm_resample.h
@@ -48,7 +48,7 @@ struct pcm_resample_state {
uint8_t channels;
} prev;
- bool error;
+ int error;
#endif
struct pcm_buffer buffer;
@@ -82,8 +82,8 @@ pcm_resample_16(struct pcm_resample_state *state,
uint8_t channels,
unsigned src_rate,
const int16_t *src_buffer, size_t src_size,
- unsigned dest_rate,
- size_t *dest_size_r);
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r);
/**
* Resamples 32 bit PCM data.
@@ -102,8 +102,8 @@ pcm_resample_32(struct pcm_resample_state *state,
uint8_t channels,
unsigned src_rate,
const int32_t *src_buffer, size_t src_size,
- unsigned dest_rate,
- size_t *dest_size_r);
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r);
/**
* Resamples 24 bit PCM data.
@@ -122,14 +122,14 @@ pcm_resample_24(struct pcm_resample_state *state,
uint8_t channels,
unsigned src_rate,
const int32_t *src_buffer, size_t src_size,
- unsigned dest_rate,
- size_t *dest_size_r)
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r)
{
/* reuse the 32 bit code - the resampler code doesn't care if
the upper 8 bits are actually used */
return pcm_resample_32(state, channels,
src_rate, src_buffer, src_size,
- dest_rate, dest_size_r);
+ dest_rate, dest_size_r, error_r);
}
#endif
diff --git a/src/pcm_resample_internal.h b/src/pcm_resample_internal.h
index a10ba08cd..74363a590 100644
--- a/src/pcm_resample_internal.h
+++ b/src/pcm_resample_internal.h
@@ -40,8 +40,8 @@ pcm_resample_lsr_16(struct pcm_resample_state *state,
uint8_t channels,
unsigned src_rate,
const int16_t *src_buffer, size_t src_size,
- unsigned dest_rate,
- size_t *dest_size_r);
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r);
const int32_t *
pcm_resample_lsr_32(struct pcm_resample_state *state,
@@ -49,8 +49,8 @@ pcm_resample_lsr_32(struct pcm_resample_state *state,
unsigned src_rate,
const int32_t *src_buffer,
G_GNUC_UNUSED size_t src_size,
- unsigned dest_rate,
- size_t *dest_size_r);
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r);
#endif
diff --git a/src/pcm_resample_libsamplerate.c b/src/pcm_resample_libsamplerate.c
index 6d019e892..66a1c3193 100644
--- a/src/pcm_resample_libsamplerate.c
+++ b/src/pcm_resample_libsamplerate.c
@@ -30,6 +30,12 @@
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "pcm"
+static inline GQuark
+libsamplerate_quark(void)
+{
+ return g_quark_from_static_string("libsamplerate");
+}
+
void
pcm_resample_lsr_deinit(struct pcm_resample_state *state)
{
@@ -77,9 +83,10 @@ out:
return convalgo;
}
-static void
+static bool
pcm_resample_set(struct pcm_resample_state *state,
- uint8_t channels, unsigned src_rate, unsigned dest_rate)
+ uint8_t channels, unsigned src_rate, unsigned dest_rate,
+ GError **error_r)
{
static int convalgo = -1;
int error;
@@ -92,9 +99,9 @@ pcm_resample_set(struct pcm_resample_state *state,
if (channels == state->prev.channels &&
src_rate == state->prev.src_rate &&
dest_rate == state->prev.dest_rate)
- return;
+ return true;
- state->error = false;
+ state->error = 0;
state->prev.channels = channels;
state->prev.src_rate = src_rate;
state->prev.dest_rate = dest_rate;
@@ -104,16 +111,18 @@ pcm_resample_set(struct pcm_resample_state *state,
state->state = src_new(convalgo, channels, &error);
if (!state->state) {
- g_warning("cannot create new libsamplerate state: %s",
- src_strerror(error));
- state->error = true;
- return;
+ g_set_error(error_r, libsamplerate_quark(), state->error,
+ "libsamplerate initialization has failed: %s",
+ src_strerror(error));
+ return false;
}
data->src_ratio = (double)dest_rate / (double)src_rate;
g_debug("setting samplerate conversion ratio to %.2lf",
data->src_ratio);
src_set_ratio(state->state, data->src_ratio);
+
+ return true;
}
const int16_t *
@@ -121,9 +130,10 @@ pcm_resample_lsr_16(struct pcm_resample_state *state,
uint8_t channels,
unsigned src_rate,
const int16_t *src_buffer, size_t src_size,
- unsigned dest_rate,
- size_t *dest_size_r)
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r)
{
+ bool success;
SRC_DATA *data = &state->data;
size_t data_in_size;
size_t data_out_size;
@@ -132,11 +142,18 @@ pcm_resample_lsr_16(struct pcm_resample_state *state,
assert((src_size % (sizeof(*src_buffer) * channels)) == 0);
- pcm_resample_set(state, channels, src_rate, dest_rate);
+ success = pcm_resample_set(state, channels, src_rate, dest_rate,
+ error_r);
+ if (!success)
+ return NULL;
/* there was an error previously, and nothing has changed */
- if (state->error)
+ if (state->error) {
+ g_set_error(error_r, libsamplerate_quark(), state->error,
+ "libsamplerate has failed: %s",
+ src_strerror(state->error));
return NULL;
+ }
data->input_frames = src_size / sizeof(*src_buffer) / channels;
data_in_size = data->input_frames * sizeof(float) * channels;
@@ -151,9 +168,10 @@ pcm_resample_lsr_16(struct pcm_resample_state *state,
error = src_process(state->state, data);
if (error) {
- g_warning("error processing samples with libsamplerate: %s",
- src_strerror(error));
- state->error = true;
+ g_set_error(error_r, libsamplerate_quark(), error,
+ "libsamplerate has failed: %s",
+ src_strerror(error));
+ state->error = error;
return NULL;
}
@@ -191,9 +209,10 @@ pcm_resample_lsr_32(struct pcm_resample_state *state,
uint8_t channels,
unsigned src_rate,
const int32_t *src_buffer, size_t src_size,
- unsigned dest_rate,
- size_t *dest_size_r)
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r)
{
+ bool success;
SRC_DATA *data = &state->data;
size_t data_in_size;
size_t data_out_size;
@@ -202,11 +221,18 @@ pcm_resample_lsr_32(struct pcm_resample_state *state,
assert((src_size % (sizeof(*src_buffer) * channels)) == 0);
- pcm_resample_set(state, channels, src_rate, dest_rate);
+ success = pcm_resample_set(state, channels, src_rate, dest_rate,
+ error_r);
+ if (!success)
+ return NULL;
/* there was an error previously, and nothing has changed */
- if (state->error)
+ if (state->error) {
+ g_set_error(error_r, libsamplerate_quark(), state->error,
+ "libsamplerate has failed: %s",
+ src_strerror(state->error));
return NULL;
+ }
data->input_frames = src_size / sizeof(*src_buffer) / channels;
data_in_size = data->input_frames * sizeof(float) * channels;
@@ -221,9 +247,10 @@ pcm_resample_lsr_32(struct pcm_resample_state *state,
error = src_process(state->state, data);
if (error) {
- g_warning("error processing samples with libsamplerate: %s",
- src_strerror(error));
- state->error = true;
+ g_set_error(error_r, libsamplerate_quark(), error,
+ "libsamplerate has failed: %s",
+ src_strerror(error));
+ state->error = error;
return NULL;
}